--- product_id: 644624152 title: "Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm)" brand: "fnktek" price: "NT$1375" currency: TWD in_stock: true reviews_count: 8 category: "Fnktek" url: https://www.desertcart.tw/products/644624152-weight-stack-pin-and-spring-collar-weight-stack-extender-pin store_origin: TW region: Taiwan --- # 150mm & 200mm length options Solid alloy steel build Supports +130 lbs extra load Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) **Brand:** fnktek **Price:** NT$1375 **Availability:** ✅ In Stock ## Summary > 🏋️‍♀️ Unlock hidden strength with every rep! ## Quick Answers - **What is this?** Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) by fnktek - **How much does it cost?** NT$1375 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/644624152-weight-stack-pin-and-spring-collar-weight-stack-extender-pin) ## Best For - fnktek enthusiasts ## Why This Product - Trusted fnktek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Premium solid steel construction resists bending and wear - • **Safe & Secure:** Snug fit with spring collar ensures stable, worry-free lifting sessions - • **Extend Your Limits:** 150mm and new 200mm pin lengths to expand your workout possibilities - • **Maximize Your Gains:** Add up to 130 lbs extra weight for next-level muscle challenge - • **Custom Fit Flexibility:** Choose between 8mm or 10mm diameters for perfect compatibility ## Overview The FNKTEK Weight Stack Pin and Spring Collar is a durable alloy steel gym accessory designed to extend the weight capacity of cable towers and functional trainers. Available in 8mm and 10mm diameters with 150mm and 200mm lengths, it supports adding up to 130 lbs extra weight safely and securely, making it ideal for both home and commercial gym setups. ## Description Product description Why choose FNKTEK weight stacking pins? Our weight stacking pins are designed to be used to add extra weight plates to the side of the cable machine weight stack, adding weight to help you perform more physical activity and gain better body shape and muscle strength. Compared with other fitness equipment, the weight stacking pin kit is smaller in size and more suitable for mobile carrying. You can also take it with you to add weight to the weight stack when you go to other gyms to workout. FNKTEK weight stacking pins are available in four sizes, pin length 110mm x diameter 10 mm, pin length 110mm x diameter 8 mm, pin length 80mm x diameter 10 mm, pin length 80mm x diameter 8 mm, you will need to check before purchasing to see if this is the size you need, with the 8mm diameter being suitable for counterweight stacks up to 10mm in diameter and the 10mm The 8mm diameter is for 10mm diameter counterweight stacks and the 10mm pin is for 12mm diameter counterweight stacks. COMPATIBILITY 8MM 0R 10Mm? Everything you need to choose the correct pin size—either 8mm or 10mm-for your cable machine. Different manufacturers use specific pin diameters for their weight stacks, and this guide is designed to help you identify the right fit for your equipment.Simply locate your machine's brand or model in the guide to determine whether the 8mm or 10mm GymPin is the best match. Selecting the correct size ensures a secure fit and safe use, so you can confidently enhance your workouts without any hassle. *Life fitness & Precor both used 8mm & 10mm diameter at different times. Please measure the diameter of the machines before ordering. The 2 inch solid sockets are made from hardened steel and you can add as much weight as you like to them without any problems, they will feel heavy when you try to pick them up. The pins come in four sizes, once you have purchased the correct size, insert the pins into the weight stack and you are ready to go, simple to use and easy to plug and unplug. The kit also includes a spring-loaded ring to hold the barbell piece added to the sleeve for an excellent fit. Review: So good it got stolen! - My gym has your standard, run-of-the-mill, weight stack cable machines. A decent enough machine, but is limited to 10lb increments. Now, that’s fine, but sometimes you just want a little heavier… that fine control, ya know? So, I got this thing as a donation to this gym, and it was next level good. Talked to the local Personal Trainer and he swore by it! Come into the gym a few weeks later and couldn’t find it anywhere. I asked that same PT and he says it got lifted some time earlier. Made me sad. But, it’s a testament to how game changing this is- especially for folks who are serious about progressive overload on weight stack machines. Bought another and this one stays with me. Review: Scam - After reading the somewhat good reviews I decided to purchase this item. NEVER AGAIN!!!!!!!! It broke on the first use with a measly 50 pounds. DON’T BUY! ## Features - More size options: In addition to the 150MM length, our pin-loaded bar now offers a new 200MM length option. This extended bar allows for increased weight capacity, providing more possibilities for your workouts. - Product Use: Weight stacking pins are suitable for home and professional fitness equipment. Simply insert it into the weight stacker and gradually add weight to the sleeve as needed for your workout. Enhance your workout and easily achieve your fitness goals. - Package Content: Package includes a weight stacking pin and a spring ring. The weight stacking pin sleeve is long enough and designed to fit a 2 inch Olympic weight plate to add extra weight. If your machine can no longer expand the weight on its own, it's much better to use our weight stacking pin than to buy a new machine. - Premium Quality Materials:Weight stacking pins are made of sturdy solid steel for safety, reliability, resistance to bending and long life. Up to 130 pounds of extra weight can be added to the equipment to ensure that your muscles are constantly being challenged in new ways! - Buying Guide: Our weight stacking pins are available in 5/16 inch (8 mm) and 3/8 inch (10 mm) diameter pins. Please note that the 8mm pins are for fitness equipment with a 10mm diameter and the 10mm pins are for fitness equipment with a 12mm diameter. Before purchasing, please measure the cable stacking pin diameter to select the appropriate size for your fitness equipment. - Reliable Gym Accessory: This pin extender fits snugly into the weight rack of your gym machine, ensuring a safe and stable weightlifting workout. One thing to keep in mind is the distance from the hole of the insert to the floor is appropriate to put the weight plates on. ## Technical Specifications | Specification | Value | |---------------|-------| | Item Package Dimensions L x W x H | 11.18 x 4.88 x 3.82 inches | | Package Weight | 0.79 Kilograms | | Item Dimensions LxWxH | 4.7 x 3 x 10 inches | | Brand Name | FNKTEK | | Model Name | chaxiaogan-8-110(150mm | | Color | Black | | Material | Alloy Steel | | Suggested Users | unisex-adult | | Manufacturer | FNKTEK | | Part Number | chaxiaogan | | Included Components | 1X Spring Clip Collar, 1X weight stack pin | ## Images ![Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) - Image 1](https://m.media-amazon.com/images/I/61MJmMzB-ZL.jpg) ![Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) - Image 2](https://m.media-amazon.com/images/I/71pMF9DFjKL.jpg) ![Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) - Image 3](https://m.media-amazon.com/images/I/71wx7psPKyL.jpg) ![Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) - Image 4](https://m.media-amazon.com/images/I/711WUJYRGXL.jpg) ![Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machine (Hanger Rod Length: 150 mm, Ø 8 mm,Length 110mm) - Image 5](https://m.media-amazon.com/images/I/71GMaG+UQmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ So good it got stolen! *by M***Y on June 24, 2025* My gym has your standard, run-of-the-mill, weight stack cable machines. A decent enough machine, but is limited to 10lb increments. Now, that’s fine, but sometimes you just want a little heavier… that fine control, ya know? So, I got this thing as a donation to this gym, and it was next level good. Talked to the local Personal Trainer and he swore by it! Come into the gym a few weeks later and couldn’t find it anywhere. I asked that same PT and he says it got lifted some time earlier. Made me sad. But, it’s a testament to how game changing this is- especially for folks who are serious about progressive overload on weight stack machines. Bought another and this one stays with me. ### ⭐ Scam *by J***E on September 17, 2025* After reading the somewhat good reviews I decided to purchase this item. NEVER AGAIN!!!!!!!! It broke on the first use with a measly 50 pounds. DON’T BUY! ### ⭐⭐ go light *by J***S on April 9, 2026* Bent with only 2 plates on ## Frequently Bought Together - FNKTEK Weight Stack Pin and Spring Collar Weight Stack Extender Pin Commercial and Home Gym Accessories for Cable Tower and Functional Trainer Machin - PERFORMANCE PIN The Original Drop Set Pins for Gym | One More Rep with Weight Stack Pins | Instant Transition to Lower Weights for More Reps | Proudly Made in America | 5/16" Pin - Gymreapers Ankle Straps (Pair) For Cable Machine Kickbacks, Glute Workouts, Lower Body Exercises - Adjustable Leg Straps with Neoprene Padding --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tw/products/644624152-weight-stack-pin-and-spring-collar-weight-stack-extender-pin](https://www.desertcart.tw/products/644624152-weight-stack-pin-and-spring-collar-weight-stack-extender-pin) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-06-04*