zvd metal countersunk bits, 3 pcs 4 12 20 32mm metal countersunk bits triangular conical hex countersunk bits stainless steel metal titanium coated

specifications 4 32mm 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm 6.35mm rod 4 20mm 4, 6, 8, 10, 12, 14, 16, 18, 20mm 6.35mm shank 4 12mm 4, 5, 6, 7, 8, 9, 10, 11, 12mm 6.35mm shank strong and rust proof high speed steel made of high quality high speed steel for fast cutting fine mater