Hss Tapered Step Drill Bit With Titanium Coating Grooved For Wood Metal Stainless Steel Gold

Description: Features: Quality; superior. These drills automatically deburr the holes as they are drilled. as you drill. The design at; two flutes allows a faster and smoother cut. Titanium Nitride coating for cooler operation. Quick change 1/4 hex shank. High speed steel for long life. These step bits are ideal for a variety of materials such as metal plastic fiberglass wood etc. They also help to enlarge existing holes The two-flute design allows for faster penetration without chipping ;expensive. Features: 3-step drill sizes: 1) 5-step drill bits from 4-12 (4mm 6mm 8mm 10mm 12mm) 2) 4-20 9-step drill bits (4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm). 10 tiers from 3 to 12 (3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm). Package Contents ;packaging: 1 drill bit