---
product_id: 63241361
title: "drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry"
brand: "ttp hard"
price: "NT$1118"
currency: TWD
in_stock: true
reviews_count: 3
url: https://www.desertcart.tw/products/63241361-drills-8mm-drill-bit-cobalt-metal-drill-bits-for-drilling
store_origin: TW
region: Taiwan
---

# Rockwell Hardness 66 tested durability 135° split point for fast, precise drilling 5% Cobalt M35 for extreme hardness drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry

**Brand:** ttp hard
**Price:** NT$1118
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill like a pro, last like a legend!

## Quick Answers

- **What is this?** drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry by ttp hard
- **How much does it cost?** NT$1118 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/63241361-drills-8mm-drill-bit-cobalt-metal-drill-bits-for-drilling)

## Best For

- ttp hard enthusiasts

## Why This Product

- Trusted ttp hard brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unmatched Durability:** Outlasts top brands with 5% cobalt steel for heavy-duty use
- • **Cool & Clog Resistant:** Designed to resist overheating and debris build-up for uninterrupted work
- • **Precision Engineering:** 135° split point ensures cleaner, faster cuts every time
- • **Contractor-Grade Value:** Professional quality at an unbeatable price with 10-piece set included
- • **Multi-Material Mastery:** Effortlessly drills wood, steel, cast iron, and stainless

## Overview

These 8mm cobalt drill bits feature 5% M35 cobalt steel and a 135° split point tip, delivering exceptional hardness (Rockwell 66) and precision. Engineered for heavy-duty drilling through tough metals like cast iron, stainless steel, and more, they resist clogging and overheating for fast, clean cuts. Trusted by professionals and DIYers alike, this 10-piece set offers premium durability and versatility at a great value.

## Description

Do you want a metal drill bit you can rely on? Tired of spending good money on drill bits that just do not perform as you expect Invest in a contractor grade drill bit set and discover the the difference thousands of other buyers have experienced. Drilling harder metals with confidence. LONG-LASTING DURABILITY – Drill through tough materials like cast iron and steel effortlessly. These cobalt bits stay sharp, outlasting top name brands even after repeated heavy-duty use. RAZOR-SHARP PRECISION – Experience cleaner, faster drilling with bits that maintain their sharpness, ensuring smooth cuts through wood, metal, and more, without frequent replacements. VERSATILE FOR MULTIPLE MATERIALS – Ideal for wood, drywall, mild steel, and even hard-to-cut metals. Perfect for a wide range of tasks, from home projects to automotive and industrial use. GREAT VALUE FOR THE PRICE – Get premium performance at an affordable price. These bits deliver exceptional quality and come in a value pack, ensuring you always have extras on hand. FAST, EFFICIENT DRILLING – Designed to drill through materials like butter, these bits resist clogging and overheating, saving you time and effort on every project, big or small. TESTED FOR HARDNESS - Purchase with peace of mind! Our cobalt drill bit sets have been tested for Hardness and have a Rockwell Hardness score of 66. THE CHOICE OF CONTRACTORS - Use what the professionals use! We sell to installers, mechanics, locksmiths and DIY enthusiasts. Drill metals with confidence when you chose the best. Get Yours Now Before They’re Gone! ADD TO CART

## Features

- LONG-LASTING DURABILITY – Drill through tough materials like cast iron and steel effortlessly. These cobalt bits stay sharp, outlasting top name brands even after repeated heavy-duty use.
- RAZOR-SHARP PRECISION – Experience cleaner, faster drilling with bits that maintain their sharpness, ensuring smooth cuts through wood, metal, and more, without frequent replacements.
- VERSATILE FOR MULTIPLE MATERIALS – Ideal for wood, drywall, mild steel, and even hard-to-cut metals. Perfect for a wide range of tasks, from home projects to automotive and industrial use.
- GREAT VALUE FOR THE PRICE – Get premium performance at an affordable price. These bits deliver exceptional quality and come in a value pack, ensuring you always have extras on hand.
- FAST, EFFICIENT DRILLING – Designed to drill through materials like butter, these bits resist clogging and overheating, saving you time and effort on every project, big or small.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | TTP HARD drill bits |
| Part number | HARD80 |
| Item Weight | 32 g |
| Product Dimensions | 15 x 1 x 1 cm; 32 g |
| Manufacturer reference | HARD80 |
| Finish | Chrome,Stainless Steel |
| Material | Cobalt |
| Item Package Quantity | 1 |
| Number of Pieces | 10 |
| Handle material | metal |
| Tool tip description | 135 deg split point |
| Included components | Drill Bits |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Cobalt
- **Finish type:** Chrome,Stainless Steel
- **Shank type:** Round Shank
- **Cutting angle string:** 135 Degrees
- **Brand:** TTP HARD

## Images

![drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry - Image 1](https://m.media-amazon.com/images/I/513xVWk8NeL.jpg)
![drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry - Image 2](https://m.media-amazon.com/images/I/71xfbjGfYsL.jpg)
![drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry - Image 3](https://m.media-amazon.com/images/I/71nkPX0EVQL.jpg)
![drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry - Image 4](https://m.media-amazon.com/images/I/61846FlVioL.jpg)
![drills 8mm drill bit - Cobalt metal drill bits for drilling hard steel, cast iron, sheet metal & stainless, hardened heavy duty twist drills, 5% cobalt M35 jobber wood masonry - Image 5](https://m.media-amazon.com/images/I/71hFvko1oXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use slow drill speed - success in Brinell HBW=500 / Rockwell C = 51 / Hardox 500
*by H***J on 29 August 2019*

I initially struggled to get success with this drill bit, but turned out to be my fault. Using a 14.4V battery hand drill I could barely make a small indent into a 15mm thick flat wear bar (similar, but not the same as, Hardox 500) with Brinell hardness of HBW=500 +/-10% (= approx. HRC=47-56 Rockwell C scale). These drill bits are certified at Rockwell C=66 so should have no problem in this metal.Turns out my inexperience was to fault - I was trying too high a drill speed, and probably not enough downforce to get it going. I also blunted it by trying hammer action when all else failed (bad + stupid idea). In the end with a bit of trial and error I found a good technique to carefully re-sharpen it on my bench grinder, then slowed the drill speed right down and with firm force to get it going it the drill cuttings started to form and drill bit made it's way through ok, though I stopped several times to sharpen it again until I got a good profile that lasted longer. I think when you hear the squeaking sound you need to add more cutting paste/fluid. I also tested the TTP paste against some old (unused) Castrol magnatec engine oil and the TTP cutting paste definitely lasts considerably longer before squeaking begins.

### ⭐ Did not work on high tensile bolt
*by H***K on 2 November 2022*

Bought 4 x Cobalt M35 metric drill bits for metal by TTP HARD drills. 7mm, 7.5mm, 8mm and 10mm. None of these made any more than a slight mark on a high tensile steel bolt. I bought them based on the online video by TTP. An expensive waste of money- Very dissappointed.

### ⭐⭐⭐⭐⭐ After an issue with delivery they finally arrived.
*by P***K on 18 July 2021*

Excellent bits they are capable of drilling really hard steee.

---

## 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/63241361-drills-8mm-drill-bit-cobalt-metal-drill-bits-for-drilling](https://www.desertcart.tw/products/63241361-drills-8mm-drill-bit-cobalt-metal-drill-bits-for-drilling)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-25*