Oltre Square Mortise Chisel Bit & Sleeve Set - 3/4" Shank

Drill Square Holes in Wood Using Your Drill Press

Our mortise chisel bits are specially designed to cut clean, square holes in wood using either a dedicated mortising machine or a drill press fitted with a mortising attachment. The inner twist drill removes material, while the outer square chisel slices the corners clean — making them ideal for mortise and tenon joinery.

Crafted from high carbon steel and chrome plated for durability and smooth cutting, they’re perfect for both hardwood and softwood applications.

Features

• Made from high carbon steel for strength and long-lasting edge sharpness

• Chrome plated for corrosion resistance and smoother operation

• Cuts clean, square mortises with precision

• Suitable for hardwood, softwood, and composite timbers

• 3/4" shank fits most mortising machines and drill press attachments

• Available individually or in value 5-piece sets

• Offered in both metric (6mm–12mm) and imperial (1/4"–1/2") sizes

Ideal for

• Drilling square holes in wood

• Use with drill press mortising attachments

• Mortise and tenon joinery

• Compatible with 3/4" chisel holders

Suit

• Mortise and tenon joinery

• Furniture making

• Cabinet and door construction

• Timber framing

• Precision woodworking