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.
Description
Specification:
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
Package Included:
4 x NUZAMAS Square Hole Drill Bits
Please note that you will need a drill press and mount to use this drill bit set.