GTA Mengshen Cobalt Step Drill Bits 4-32mm Spiral Groove, hss M35 Cutout Enlarge Stainless Steel Plate for Quenching Steel Plate Steel Plate Drilling

Much Harder - M35 HSS is much harder than HSS 4241, suitable for drilling stainless steel plates and quenching steel plates, iron plates, aluminum, wood. Good Design: Triangular shank fits into power tool chuck securely and eliminates slippage. The two flute design removes chips faster and allows particles to escape easily. The split tip increases speed. It can automatically deburr the holes while drilling to keep the drill bit clean. One step drill bit meets all your requirements, 4-32mm M35 HSS with 15 sizes: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm , 22mm, 24mm, 26mm, 28mm, 30mm, 32mm You can use water to cool it down when it works and it can be used even longer.