6Pcs 1/4 3/8 Inch HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Core Drilling Tools Set Drill Bit 6Pcs 1/4 3/8 Inch HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Core Drilling Tools Set Drill Bit. Sale price : $17.88 Category : Tools