Mortising Square Hole Bits for Woodworking, HSS Wood Square Mortiser Chisel Drill Bits Woodworker Hollow Mortise Hole Saw Kits 6Pcs 1/4~9/16 Inch

Product description 6PCS Woodworking Square hole drill Bits Kits Come with total 6pcs different size square drill bits, 1/4"(6.4mm), 5/16"(8mm), 3/8"(9.5mm), 12/25"(12mm), 1/2"(12.7mm), 9/16"(14mm).

Each mortising chisel bit is composed of hollow square chisel and an auger bit that fits inside, and easy to lock the hole on the wood Spiral drill core and square hole drill shell High quality This woodworking square hole drill bits are made of high speed steel(HSS), with heat treatment, ensure strong abrasion resistance and fast drilling speed.

These square drill bits designed with U-shaped design to facilitate the discharge of wood chips and improve the drilling efficiency.

Which can work with a tongue-and-groove machine or tongue-and-groove attachment These woodworking square drill bits are suitable for construction, installation, renovation, decoration industry, etc.

But it is not suitable for processing metal, glass, plastic, concrete, gypsum board etc.