---
product_id: 23535912
title: "Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16\" to 3/8\" x 64ths"
brand: "precision twist drill"
price: "FREE"
currency: THB
in_stock: false
url: https://www.desertcart.co.th/products/23535912-precision-twist-c21r10-high-speed-steel-jobber-length-drill-bit
store_origin: TH
region: Thailand
---

# 21-piece set High-speed steel 118° point Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16" to 3/8" x 64ths

**Brand:** precision twist drill
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Drill Your Way to Perfection!

## Quick Answers

- **What is this?** Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16" to 3/8" x 64ths by precision twist drill
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/23535912-precision-twist-c21r10-high-speed-steel-jobber-length-drill-bit)

## Best For

- precision twist drill enthusiasts

## Why This Product

- Trusted precision twist drill brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** High-speed steel ensures long-lasting performance.
- • **Perfect Precision:** 118-degree point for clean, accurate drilling.
- • **Enhanced Efficiency:** Black oxide finish for superior chip flow.
- • **Standard Compliance:** Conforms to ANSI standards for reliability.
- • **Unmatched Versatility:** 21 precision bits for every project.

## Overview

The Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set is a comprehensive 21-piece collection designed for professionals. Ranging from 1/16" to 3/8" in 1/64" increments, these high-speed steel bits feature a black oxide finish that enhances durability and efficiency, while the 118-degree conventional point ensures precision in various drilling applications. Conforming to ANSI standards, this set is a must-have for any serious toolkit.

## Description

This Precision Twist C21R10 jobber length drill bit set contains 21 high-speed steel drill bits, including inch sizes 1/16" through 3/8" in 1/64" increments, with a black oxide finish and a 118-degree conventional point for use in general-purpose applications on ferrous materials. High-speed steel (HSS) provides hardness for wear resistance, and the black oxide finish acts as a lubricant to reduce wear while promoting chip and coolant flow. These jobber length drill bits have a drilling depth up to four times their diameter. The round shank accommodates most drill chucks. The set comes in a metal index case with labeled compartments for identification and organization. Drill bits conform to American National Standards Institute (ANSI) standards.Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach to work with the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with either a 1/2" or 3/4" drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra long twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.What’s in the Box?21 drill bits, inch sizes 1/16" through 3/8" in 1/64" incrementsMetal case

## Features

- Set of 21 jobber length drill bits includes inch sizes 1/16" through 3/8" in 1/64" increments
- High-speed steel (HSS) provides hardness for wear resistance
- Black oxide finish reduces wear while promoting chip and coolant flow on ferrous materials
- 118-degree conventional point for a range of drilling applications
- Drill bits conform to ANSI standards

## Images

![Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16" to 3/8" x 64ths - Image 1](https://m.media-amazon.com/images/I/919FTyECgWL.jpg)
![Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16" to 3/8" x 64ths - Image 2](https://m.media-amazon.com/images/I/610tZSCeznL.jpg)
![Precision Twist C21R10 High Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 21 Piece, 1/16" to 3/8" x 64ths - Image 3](https://m.media-amazon.com/images/I/716EvQONrvL.jpg)

---

## 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.co.th/products/23535912-precision-twist-c21r10-high-speed-steel-jobber-length-drill-bit](https://www.desertcart.co.th/products/23535912-precision-twist-c21r10-high-speed-steel-jobber-length-drill-bit)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-06*