--- product_id: 634341381 title: "JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4\"\" Steel to Help Prevent Post Damage., Black" brand: "jack stack" price: "NT$5843" currency: TWD in_stock: true url: https://www.desertcart.tw/products/634341381-jack-stack-bottle-jack-to-post-adaptor-center-4x4-post store_origin: TW region: Taiwan --- # 3-5/8” square opening fits standard 4x4 posts Includes 4 screws for secure positioning 1/4" steel plate for durability JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black **Brand:** jack stack **Price:** NT$5843 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate with confidence—center your lift, avoid the slip, and jack smarter! ## Quick Answers - **What is this?** JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black by jack stack - **How much does it cost?** NT$5843 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/634341381-jack-stack-bottle-jack-to-post-adaptor-center-4x4-post) ## Best For - jack stack enthusiasts ## Why This Product - Trusted jack stack brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Installation:** Comes with 4 screws for quick, secure mounting—plus tips for shim adjustments to fit thinner saddles perfectly. - • **Precision Centering:** Patent-pending design ensures your 4x4 post stays perfectly aligned over the bottle jack saddle, reducing tipping risks. - • **Universal Compatibility:** Fits most 4"x4" posts and jack saddles up to 2" thick, making it a versatile addition to your toolkit. - • **Load Distribution Excellence:** Rimmed steel plate evenly spreads weight to prevent post base damage and slipping during lifting. - • **Heavy-Duty Steel Construction:** Built with a robust 1/4" steel plate and powder coat finish for long-lasting strength and corrosion resistance. ## Overview The JACK STACK Bottle Jack to Post Adaptor is a precision-engineered steel accessory designed to center 4x4 posts on bottle jack saddles up to 2" thick. Featuring a durable 1/4" steel plate with a rim for load distribution, it prevents post slipping and base damage while enhancing lifting safety. Weighing just under 800g and including mounting screws, it fits most standard 4x4 posts and is powder-coated for corrosion resistance. Note: bottle jack and post sold separately. ## Description Using the patent pending JACK STACK assists in centering the typical 4x4 jacking post over a bottle jack. The JACK STACK sits on top of your bottle jack saddle, and the screws are adjusted to center the JACK STACK and jacking post above directly over the bottle jack. Lifting with an off-centered jacking assembly will easily tip as load increases. JACK STACK is added convenience in keeping your post centered over your jack as well as distributing the load over the bottom of the post. It accommodates up to a 2” jack saddle (head) and 3-5/8” jacking post. Most 4"x4" posts are 3-1/2", but please ensure your jack and your favorite jacking post fit before ordering. Neither bottle jack nor post is included. ## Features - Added convenience while jacking. - 1/4" steel plate with rim to aid in centering the post, prevent the post from slipping off the jack, and to minimize any post base damage via load distribution. 3-5/8” square opening to fit the typical 4"x4" (nominal) post. - Welded construction and powder coat finish. - Max 2" opening to accommodate most jack saddles. 4/EA screws included and used for positioning the post directly over the jack. Screw thread distance to baseplate is 5/16", so please check your jack saddle thickness. Smaller saddles may not contact the entire screw face, so adding properly sized steel shims/washers (not included - see video) between saddle and baseplate may remendy said issue on thinner saddles. You can center on sloped saddles, but tightening may or may not work. - WARNING: This product aids in centering the jacking post over the jack saddle, which is just ONE point of alignment in the lifting assembly. This product was NOT made to afix the adaptor to the saddle to allow for working on uneven ground or using if the load above is off-centered from the jack/post, etc. Under improper loading conditions, your jack will likely tip. - NOTE: Some older, swollen, or various other 4x4 lumber may be larger than 3-1/2”. It’s likely that 99% of the posts from a home improvement and lumber yards will fit. If yours does not fit, you have a choice of carefully chiseling/trimming the bottom 3/4” of the post or finding a normal post to use. - DISCLAIMER: From the heavy steel construction, the centering ability, and the tight post clearance, heavy emphasis went into this design to ensure you have a better jacking experience. Ultimately, jack safety is YOUR responsibility. Please research jack safety if you need additional guidance. Jacking is dangerous. You can get hurt or die by not using proper safety, overloading, working on slopes, using defective equipment, etc. This device may or may not make jacking safer. - Adapter and screws only. Bottle jack nor the post is included. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Narrow Path Construction | | Brand | JACK STACK | | Model | JACK STACK | | Product Dimensions | 10.16 x 10.16 x 5.08 cm; 798 g | | Item model number | 4x4 | | Manufacturer Part Number | JS4x4 | | Item Weight | 798 g | ## Product Details - **Vehicle service type:** Trucks, SUVs, Some Trailers and Off-road Vehicles - **Material:** Alloy Steel - **Brand:** JACK STACK - **Colour:** Black - **Item dimensions L x W x H:** 10.2 x 10.2 x 5.1 centimeters ## Images ![JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - Image 1](https://m.media-amazon.com/images/I/71dZ1U7pzdL.jpg) ![JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - Image 2](https://m.media-amazon.com/images/I/61XK7F9ZkdL.jpg) ![JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - Image 3](https://m.media-amazon.com/images/I/71kuOMv4GeL.jpg) ![JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - Image 4](https://m.media-amazon.com/images/I/61mChDe5h+L.jpg) ![JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - Image 5](https://m.media-amazon.com/images/I/61DZhbmEvwL.jpg) ## Frequently Bought Together - JACK STACK - Bottle Jack to Post Adaptor. Center 4x4 Post While Utilizing 1/4"" Steel to Help Prevent Post Damage., Black - BIG RED T92003B Torin Hydraulic Welded Bottle Jack, 20 Ton (40,000 lb) Capacity, Red - BIG RED T92007A Torin Hydraulic Stubby Low Profile Welded Bottle Jack, 20 Ton (40,000 lb) Capacity, Red --- ## 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/634341381-jack-stack-bottle-jack-to-post-adaptor-center-4x4-post](https://www.desertcart.tw/products/634341381-jack-stack-bottle-jack-to-post-adaptor-center-4x4-post) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-05-17*