4Pcs HSS Mortising Chisel Set, Woodworker Square Hole Drill Bits Wood Mortising Chisel Set Mortise Chisel Bit Kits Woodworking Hole Saw Sets with Twist Drill DIY Mortising Chisel Power Tools

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Manufacturer Description

Material: high-speed steel
Hardness: HRC 48-50
Size: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm)
Clamping shank diameter: 19mm (Round)
Length: 210mm
Package Included: 1 x Square Hole Drill Bit

Product Features

This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment. Square hole drill can not be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use. Mortise and tenon square hole drilled by the terrible + outer sleeve in the middle of the combination. Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries. Size: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm)