This item includes 7 different sizes mortise chisel drill bit 6/25 inches (6 mm), 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 2/5 inches (10 mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm). They can meet your different ordinary need. Each square hole drill bit is packed in a single plastic case, easy to maintain.
These square hole mortise chisels drill bit are made of high-speed steel / HSS, with heat treatment, high hardness, lengthened core, high concentricity features.
These 7 pieces woodworking morstising chisel bits is with high performance flute design geometry, which can offer superior chip extraction.
These woodworking drill bits are with long drill core and square chisel, which allow you to lock the hole on the wood easily, can reduce labors, speed up the construction speed, reduce construction costs.
These woodworking morstising chisel bits can be used with most mortise and drill accessories. They are widely used for woodworking aspects in construction, installation, renovation, decoration industry, etc.
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