uxcell Square Hole Drill Bit 12 HighCarbon Steel Hollow Chisel Mortise Power Tool for Woodworking 2 Pcs

SIZE12 slotting flute diameter 75mm cutting depth 205mm total length TIP AND EDGEThe bestdesigned drilling point tip and 4 cutting corners enable fast drilling with small opening resistance and penetrating into working pieces of wood in precise opening size very smoothly and fast MATERIALMade of Highcarbon steel through heat processing with high hardness 4850 HRC drill bits and sharpedged square chisel ADVANTAGEWith long drill core and square chisel easy to lock the hole on the wood can reduce labor intensity of construction workers speed up the construction speed reduce construction costs OPERATIONUsed with mortise and tenon machine with double effect and electric drill hammer and other tools is required for punching square hole in wood.