Step Drill Bit, HSS Metal Countersink Drill Bit 3PCS 4-12/20/32mm Step Drill Steel Countersink Drill Triangle Conical Drill with Titanium Coating Screwdriver Drilling for Steel/Wood/Brass/Plastic/PVC

【3Size】1*72mm: The scale on the drill bit is 4-12. 1* 72mm: 4-20. 1*102mm: 4-32. The drill can handle holes of different sizes【Sturdy and Rustproof HSS】Made of high quality HSS, it cuts thin materials quickly. HSS provides extreme durability, and the drill bits are rust-proof. At the same time, our drill bit is suitable with electric screwdriver【Application】Step drill bit suitable for DIY, home and construction. It is very suitable for drilling holes in a variety of materials like steel/brass/wood/plastic/thin iron plate/aluminum materials/insulating plate/PVC plate, etc. Only suitable for ordinary aluminum, iron and steel plates (thickness cannot exceed 4mm, hardness is less than 25HRC), not for stainless steelSold by Bianco FR store