- Set of 4 Square Hole Drill Bits Mortising Chisel Set, 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm), extra-long Drilling core -over 210mm
- Made of high-speed steel. Heat treatment, HRC48~50, high hardness, lengthened core, high concentricity.
- Great for drilling square holes in wood with a mortising machine or a mortising attachment.
- Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects.
- Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc..
- Material: high-speed steel
- Hardness: HRC48-50
- Size: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm)
- Clamping shank diameter: 19mm (Round)
- Drilling core length: over 210mm
- 1 x Mortiser Drill Bits
- Fits all mortising machines such as PowerMatic Mortiser.
- If work in a regular drill press, it needed a Mortise Attachment (Not Included).