Woodworking Square Hole Drill Bits

Six Square-Hole Bit Sizes for Mortise Work

Prepare square mortises for furniture, cabinetry, and joinery projects with six sizes in one set. Choose bits only or the set that also includes a holder.

Why You’ll Love It

• Six Common Sizes: Both options include 6.4 mm, 8 mm, 9.5 mm, 12.7 mm, 14 mm, and 16 mm square-hole bits.
• Two Package Options: Select the bits-only set if you already have a compatible setup, or choose the set with the included holder.
• Designed for Mortise Projects: Use an appropriate mortising setup for furniture, cabinet components, frames, and other woodworking joints.
• Detailed Cutting Geometry: The cutting-end design supports square-hole preparation when correctly installed and operated.
• Plan for Chip Clearance: Follow your machine manufacturer’s feed-rate and chip-removal guidance for cleaner results.
• Easy Tool Care: Clean and dry the bits after use, inspect cutting edges, and store them securely.
• Check Before Ordering: Compatibility depends on mounting dimensions and the mortising equipment—not every handheld drill or drill press is suitable.

Six Common Sizes

Both options include 6.4 mm, 8 mm, 9.5 mm, 12.7 mm, 14 mm, and 16 mm square-hole bits.

Two Package Options

Select the bits-only set if you already have a compatible setup, or choose the set with the included holder.

Designed for Mortise Projects

Use an appropriate mortising setup for furniture, cabinet components, frames, and other woodworking joints.

Detailed Cutting Geometry

The cutting-end design supports square-hole preparation when correctly installed and operated.

Plan for Chip Clearance

Follow your machine manufacturer’s feed-rate and chip-removal guidance for cleaner results.

Easy Tool Care

Clean and dry the bits after use, inspect cutting edges, and store them securely.

Check Before Ordering

Compatibility depends on mounting dimensions and the mortising equipment—not every handheld drill or drill press is suitable.

See It in Detail

Review the product images below for setup, dimensions, features, and example applications.

Product Details

Bits-only option: 6 square-hole bits; holder not included.

Bits + holder option: The same 6 bits plus 1 drill-bit holder.

Not included: Drill press, powered machine, workpiece, clamps, or demonstration accessories not explicitly listed.

Important Safety Information

Use only with a compatible mortising setup. Secure the workpiece, disconnect power before adjustments, and follow the equipment manufacturer’s installation and operating instructions.