Harilla 5pcs Step Cone Drill Bit Set, HSS Steel, Titanium Coated, Hex Shank, High Speed and Large Hole Cutter for Wood, Stainless Steel, Sheet Metal

Description: - --5PCS High Steel HSS high hardness step drill bit metric cone drill bit set. - --Titanium coated to reduce friction and . - --No need to use center punch, not easy to break compared with ordinary drill. - --Automatically deburrs, chamfer, open hole expansion, make a clean hole as you drill. - --Use tools: drill, drill. - --The recommended drilling is 250-400 rpm. - --Suit for cutting holes in a variety of materials including thin metals, steel aluminium, copper, wood, plastic, fiberglass, brass and PVC etc.. Specification: - Material: High- Steel - Drill size: - (3/16?1/4?5/16?3/8?7/16?1/2) - (1/8,5/32.7/32.1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/32,1/2mm) - (1/4,5/16,3/8,7/16,1/2,9/16,5/8,11/16,3/4) - (3/16?1/4?5/16?3/8?7/16?1/2?9/16?5/8?11/16?3/4?13/16?7/8) - (1/4?3/8?1/2?5/8?3/4?7/8?1?1-1/8?1-1/4?1-3/8) Package Includes: 5 Pieces /Set Step Drill Bit