👷♂Top Quality：Made fromhigh speed steel,after professional heat treatment,HRC48~50,ensuring itshigh hardness and high concentricity.
👷♂Size：Packaged with4 different size for your choose, 1/4"(6.4mm), 5/16"(8mm), 3/8"(9.5mm), 1/2"(12.7mm). These long square drill bits setcan meet most of your needs, and each drills packed in a single plastic case, easy to maintain.
👷♂Efficient and labor-saving: Our woodworking squre drill bit all designedwith long drill core and square chisel,easy to lock the hole on the wood, then you can getdifferent mortisers quickly.
👷♂Widely Application: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.
Material: High-Speed Steel.
Clamping shank diameter: 1/4 INCH (6.4MM) 3/8 INCH (9.5MM) 9/16 INCH (14MM) 5/8 INCH (16MM)
Middle terrible diameter: Total length: 19.5 cm / 7.68 in; Diameter: 6.8 mm / 0.27 in
Square hole drill cannot 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.
TYPE1: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM).
TYPE2: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM) + 9/16 INCH (14MM).
TYPE3: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM) + 9/16 INCH (14MM) + 5/8 INCH (16MM) .