Eachine 3pcs Hss Spiral Grooved Step Drill Bit 4-12/4-20/4-32

Description : 3pcs HSS Spiral Grooved Step Drill Bit 4-12/4-20/4-32 Features : No need for a pilot hole Titanium coated to reduce friction and run cooler Large bit has 3 sided shank. Automatically deburr holes as you drill High speed steel,durable. Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet,ect Specification : Color : Golden (as picture shown) Material : High speed steel Surface :Titanium Plated Scop : thin iron plate,aluminum,insulation panels,PVC panels 4mm thickness within the timber. 4 - 12 mm 9 Steps (4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm),7cm(L) 4 - 20 mm 9 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm),7cm(L) 4 - 32 mm 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm),10cm(L) Package included : 1 x 4-12mm Spiral Grooved Drill 1 x 4-20mm Spiral Grooved Drill 1 x 4-32mm Spiral Grooved Drill Details pictures :