ITEM NAME:Box Of 5 High Quality HSS Steel Drills DIY Construction Description: --5PCS High speed steel HSS high hardness step drill bit metric cone drill bit set. --Titanium coated to reduce friction and heat. --No need to use center punch, not easy to break compared with ordinary twist drill. --Automatically deburrs, chamfer, open hole expansion, make a clean hole as you drill. --Use tools: pistol drill, bench drill. --The recommended drilling speed 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-speed Steel Drill size: (3/16ï ¼Å’1/4ï ¼Å’5/16ï ¼Å’3/8ï ¼Å’7/16ï ¼Å’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) (3/16ï ¼Å’1/4ï ¼Å’5/16ï ¼Å’3/8ï ¼Å’7/16ï ¼Å’1/2ï ¼Å’9/16ï ¼Å’5/8ï ¼Å’11/16ï ¼Å’3/4ï ¼Å’13/16ï ¼Å’7/8) (1/4ï ¼Å’3/8ï ¼Å’1/2ï ¼Å’5/8ï ¼Å’3/4ï ¼Å’7/8ï ¼Å’1ï ¼Å’1-1/8ï ¼Å’1-1/4ï ¼Å’1-3/8) Package Includes: 5 Pieces /Set Step Drill Bit SKU: DMO0019925759030574.No need to use center punch, not easy to break compared with ordinary twist drill. --Use tools: pistol drill, bench drill. Material: High-speed Steel. 5 Pieces /Set Step Drill Bit. (1/4ï ¼Å’3/8ï ¼Å’1/2ï ¼Å’5/8ï ¼Å’3/4ï ¼Å’7/8ï ¼Å’1ï ¼Å’1-1/8ï ¼Å’1-1/4ï ¼Å’1-3/8).
