– Sharp square hole drill bits made of bearing steel, hardness 56HRC, lengthened core, sharp cutting edge, continuous blade, quick, and high efficiency
– Set includes:
1 x 1/2-Inch(12.7mm)
1 x 1/4-Inch(6.4mm)
1 x 3/8-Inch(9.5mm)
1 x 5/8-Inch(16mm)
1 x 5/16-Inch(8mm)
1 x 9/16-Inch(14mm)