C.K Tools Vorteck HSS Cobalt Step Drill Bit 4-20mm, 5% High Speed Steel, Hex Quick-Lock Shank for Stainless Brass and Sheet Metal Drilling, Deburring Tool Electricians, T3016 4-20

DRILL, ENLARGE AND DEBURR: Designed to centre, drill and deburr sheet material in one smooth operation, helping reduce tool changes during electrical installation, fabrication and maintenance work. 5% COBALT HSS PERFORMANCE: Manufactured from 5% cobalt high speed steel for dependable drilling performance on harder materials including stainless steel and brass where standard drill bits can wear prematurely. HEX QUICK-LOCK SHANK: Vorteck 1/4" Hex Quick-Lock shank provides a secure, slip-resistant connection with compatible quick-change chucks and impact driver holders during high torque drilling applications. PRECISION GROUND DESIGN: Precision ground one-piece construction supports smoother cutting action, accurate drilling and controlled hole enlargement across multiple diameters. VERIFIED STEP SIZES: Covers 4, 6, 8, 10, 12, 14, 16, 18 and 20 mm hole sizes; product dimensions 79 x 20 x 20 mm with product weight of 49 g.