Step Drill Bits, 4 x 4-12/20/32mm Triangular Tapered Drill Bits with Titanium Coated Driver

【Size 3+1】 1*72mm: the scale on the drill bit is 4-12. 1*72mm: 4-20. 1*102mm: 4-32. 1*72mm twist drill bit. The drills can handle holes of different sizes 【Strong and rust-proof high-speed steel】Made of high-quality high-speed steel for fast cutting...