SPKLINE Hardened Stainless Plastic 1 5 6 5Mm Review

13 pcs cobalt drill bit set with commonly-used sizes for precise hole drilling into various material: 1.5mm(1/16"), 2mm(5/64"), 2.5mm(3/32"), 3mm(7/64"), 3.2mm(1/8"), 3.5mm(9/64"), 4mm(5/32"), 4.5mm(11/64"), 4.8mm(3/16"), 5mm(13/64"), 5.5mm(7/32"), 6mm(15/64"), 6.5mm(1/4"). Very tough drill bit for heavy duty work drilling into stainless steel, light-gauge metal, high-carbon steel, aluminum and alloy steel, cast iron, abrasive alloy metal, other hard metal and hardened steel. 4 times life time than normal metal drill bit when drilling into PCB board, plastic, wood, jewelry, sheet metal and normal steel. M35 Cobalt drill bits are made from industrial grade High Speed Steel with 5% cobalt alloy that is heat and abrasion-resistant. 135-degree split-point tip starts drilling immediately with less force and eliminates walking or skating across the work surface. Straight shank fits with electric and cordless power drill and rotary drill. Drill bits are packed in a Metal Indexed Storage Case for easy storage and organization