HSS Square Mortising Chisel Drill Bits – Precision Woodworking Tool

Take your woodworking projects to the next level with these HSS Square Mortising Chisel Drill Bits. Engineered for clean, precise square holes in wood, these high carbon steel bits are built for durability and consistent performance — whether you're crafting furniture joints, cabinetry, or custom woodwork.

Key Features

High-Speed Steel (HSS) Construction: Made from premium high carbon steel for long-lasting sharpness and resistance to wear.
Square Hole Precision: Combines a twist auger drill with a square chisel collar to cut clean, accurate mortise holes in a single pass.
Wide Size Range: Available in sizes from 6mm to 30mm to suit a variety of mortising and joinery applications.
Multiple Configurations: Choose from 7-piece, 6-piece, 4-piece sets, or individual sizes (12.7mm, 8mm, 6.4mm).
Extended Length Design: 22cm length provides the reach needed for deeper cuts and mortise work.
Compatible with Drill Press & Mortising Machines: Designed to fit standard bench drill presses and dedicated mortising machines.

Size & Weight Reference

Size	Weight (g)	Package Size
6mm	106g	2.5×2.5×22cm
6.4mm	123g	2.5×2.5×22cm
8mm	145g	2.5×2.5×22cm
9.5mm	163g	2.5×2.5×22cm
10mm	167g	2.5×2.5×22cm
11mm	184g	2.5×2.5×22cm
12mm	198g	2.5×2.5×22cm
12.5mm	212g	2.5×2.5×22cm
12.7mm	209g	2.2×2.5×22cm
14mm	221g	2.5×2.5×22cm
15mm	229g	2.5×2.5×22cm
16mm	233g	2.5×2.5×22cm
18mm	402g	3.3×3.3×22cm
19mm	426g	3.3×3.3×22cm
20mm	433g	3.3×3.3×22cm
22mm	498g	3.3×3.3×22cm
25mm	634g	4.3×4.3×22cm
30mm	712g	4.3×4.3×22cm

What's in the Box

Square mortising chisel drill bit(s) — quantity and size per selected option

Who Is This For?

These mortising chisel bits are ideal for woodworkers, carpenters, furniture makers, and hobbyists who need clean, square mortise cuts for joinery work. Whether you're building frames, cabinets, doors, or decorative wood pieces, these bits deliver professional-grade results.

Pair It With

Complete your woodworking toolkit with these complementary items from our store:

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Frequently Asked Questions

Q: What are HSS square mortising chisel drill bits used for in woodworking?

A: HSS square mortising chisel drill bits are used to cut precise square or rectangular holes (mortises) in wood. The twist auger removes the wood waste while the outer chisel collar squares off the corners, making them essential for mortise-and-tenon joinery, cabinet making, and furniture construction.

Q: What material are these square mortising chisel bits made from?

A: These mortising chisel bits are crafted from high carbon steel (HSS), which provides excellent hardness, edge retention, and durability for repeated use in hardwood and softwood applications.

Q: What sizes are available for these woodworking mortising chisel bits?

A: Sizes range from 6mm to 30mm, including 6mm, 6.4mm, 8mm, 9.5mm, 10mm, 11mm, 12mm, 12.5mm, 12.7mm, 14mm, 15mm, 16mm, 18mm, 19mm, 20mm, 22mm, 25mm, and 30mm. Set options include 4-piece, 6-piece, and 7-piece configurations.

Q: Are these bits compatible with a standard drill press?

A: Yes, these square mortising chisel bits are designed to be compatible with standard bench drill presses and dedicated mortising machines. Always ensure your machine's chuck capacity matches the selected bit size before use.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.