7PCs HSS Step Drill Bit Sets Straight Groove Titanium Coated Cone Hole Cutter Automatic Center Punch Spiral Twist Saw Drill Bit 7PCs HSS Step Drill Bit Sets Straight Groove Titanium Coated Cone Hole Cutter Automatic Center Punch Spiral Twist Saw Drill Bit. Sale price : $11.51 Category : Tools