Stainless Steel M35 5% Cobalt Step Drill Bit 3-12 4-22 6-24 HSS-CO High Speed Steel Cone Metal Drill Bit Tool Hole Cutter
https://www.vogueparade.com/shopping/EN/4204/1/1005003624333527/stainless-steel-m35-5-cobalt-step-drill-bit-3-12-4-22-6-24-hss-co-high-speed-steel-cone-metal-drill-bit-tool-hole-cutter//