---
product_id: 279887263
title: "Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set Twist Drill, Different Sizes 1/4\" 5/16\" 3/8\" 1/2\" 9/16\" 5/8\"(6pcs)"
brand: "dele"
price: "947 kr"
currency: NOK
in_stock: true
reviews_count: 8
category: "Dele"
url: https://www.desertcart.no/products/279887263-square-hole-mortise-chisel-drill-bit-tools-hss-woodworking-hole
store_origin: NO
region: Norway
---

# 6 precision sizes 1/4" to 5/8" 200mm core length for deep drilling HSS steel, HRC48-50 hardness Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set Twist Drill, Different Sizes 1/4" 5/16" 3/8" 1/2" 9/16" 5/8"(6pcs)

**Brand:** dele
**Price:** 947 kr
**Availability:** ✅ In Stock

## Summary

> 🔩 Drill Square, Work Sharp, Finish Faster!

## Quick Answers

- **What is this?** Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set Twist Drill, Different Sizes 1/4" 5/16" 3/8" 1/2" 9/16" 5/8"(6pcs) by dele
- **How much does it cost?** 947 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/279887263-square-hole-mortise-chisel-drill-bit-tools-hss-woodworking-hole)

## Best For

- dele enthusiasts

## Why This Product

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

## Key Features

- • **Dust-Free Precision:** Innovative design breaks and expels debris, keeping your work area clean and your cuts flawless.
- • **Effortless Efficiency:** Designed to drill square holes with minimal pressure, accelerating your workflow and cutting labor costs.
- • **Optimized for Woodwork:** Perfectly matched for tongue-and-groove machines, ensuring clean, professional mortises every time.
- • **Precision in Every Cut:** Six versatile sizes from 6.4mm to 16mm to fit all your mortising needs.
- • **Engineered for Endurance:** Crafted from high-speed steel with heat treatment for lasting sharpness and durability.

## Overview

This 6-piece mortise chisel drill bit set features high-speed steel construction with HRC48-50 hardness, offering six precise sizes from 1/4" to 5/8" and a 200mm core length. Designed specifically for square hole drilling in wood using mortising machines, it delivers clean, efficient cuts with reduced labor and debris, making it an essential upgrade for professional woodworking and installation projects.

## Description

FEATURES: Various existing bits, can only process a circular hole, square hole can not be processed, to machining square hole, must drill the hole or cutting machine processed crude hole, then chisel made from artificial hand. This utility model in the hole drilled by the rotary body, while the impact of the use of hammer impact force transmitted to the outer body, the material crushing round hole and square head wall, a one-time processing of a square hole, and the dust can be broken slag discharged from the tube. Using different specifications of the square hole drill, matching the appropriate power of the square hole machine, you can play a square hole to meet the requirements. Professional wood drill, suitable for construction, installation, decoration, decoration and other industries. Specifications: Material: HSS ;Hardness: HRC 48~50 Holder diameter: 19mm (circular) ;Drilling core length: 200mm Slotting flute diameter:1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm), 5/8 Inch(16mm). Package Included: 1 x 5/8-inch (16mm) 1 x 9/16-inch (14mm) 1 x 1/2-Inch(12.7mm) 1 x 3/8-Inch(9.5mm) 1 x 5/16-Inch(8mm) 1 x 1/4-Inch(6.4mm)

Review: Bits - Just what I needed and wanted
Review: Using as a square chisel - I didn’t buy to use with a mortiser. I intended to use to make square holes for my railing balusters. Work well and have stayed sharp. Getting the job done. Now I am looking at getting a mortiser to do more wood work.

## Features

- Size: 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm),1/2 Inch (12.7mm), 5/8 Inch (16mm), 9/16 Inch (14mm)
- Material: Made of high-speed steel,Heat treatment, HRC48~50, high hardness,lengthened core,high concentricity.
- Application: Our woodworking morstising chisel bits suitable for drilling square holes in wood with a tongue-and-groove machine or tongue-and-groove attachment, and has a long service life, please rest assured to use.
- Drills precise holes with little pressure,reduce the labor intensity of construction workers, accelerate the construction speed, reduce the construction cost of construction, installation, decoration, decoration industry.
- Notice: square hole drill needs to cooperate with square hole drill machine (mortise and tenon) use and can not use with electric drill, bench drill.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08RCGMD31 |
| Best Sellers Rank | #157,279 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #209 in Wood Drill Bit Sets |
| Brand | Dele |
| Brand Name | Dele |
| Customer Reviews | 4.2 out of 5 stars 224 Reviews |
| Cutting Angle String | 9E+1 degrees |
| Cutting Diameter | 0.25 inches |
| Finish Type | Finished |
| Finish Types | Finished |
| Manufacturer | Dele |
| Material | High Speed Steel (HSS) |
| Material Type | High Speed Steel (HSS) |
| Minimum Bore Diameter | 0.25 inches |
| Model | ttand-021 |
| Number of Flutes | 2 |
| Number of Packs | 1 |
| Number of Pieces | 6 |
| Part Number | ttand-021 |
| Point Style | Flat Point |
| Set Name | Dele 6-Piece Set |
| Shank Type | Square |
| Surface Recommendation | Wood |
| Tool Flute Type | Straight |
| Unit Count | 1 Count |

## Product Details

- **Cutting Angle String:** 9E+1 degrees
- **Cutting Diameter:** 0.25 inches
- **Finish Type:** Finished
- **Material:** High Speed Steel (HSS)
- **Shank Type:** Square

## Images

![Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set Twist Drill, Different Sizes 1/4" 5/16" 3/8" 1/2" 9/16" 5/8"(6pcs) - Image 1](https://m.media-amazon.com/images/I/61cBNCY238L.jpg)

## Questions & Answers

**Q: Can these be used on a heavy duty Drill Press?**
A: I believe you have to have a mortise machine to use a mortise chisel.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bits
*by D***K on December 6, 2025*

Just what I needed and wanted

### ⭐⭐⭐⭐⭐ Using as a square chisel
*by F***E on January 21, 2024*

I didn’t buy to use with a mortiser. I intended to use to make square holes for my railing balusters. Work well and have stayed sharp. Getting the job done. Now I am looking at getting a mortiser to do more wood work.

### ⭐⭐⭐⭐ Watch out! Get the adapter!
*by G***S on March 18, 2025*

You need to get an adapter for the drill, otherwise these bits will stay loose and not work making the square hole

## Frequently Bought Together

- Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set Twist Drill, Different Sizes 1/4" 5/16" 3/8" 1/2" 9/16" 5/8"(6pcs)
- Milescraft 1318 DrillMate Portable Drillling Guide – Precision Drilling Jig Attachment for Drilling Angled or Straight Holes, Adjustable Drill Guide Attachment, Portable Drill Press with 3/8” Chuck
- Square Hole Drill Bit Adapter for Drill Machine Accessory, Easy Installation and Disassembly, Mortising Attachment for Drill Press, Woodworking Mortise Machine, Tenon Drill Bits Fixing Bracket.

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-17*