IRWIN 7/16-Inch Cobalt Alloy Steel 135-Degree, Left Handed-Mechanics Length, Pack Of 6

The Irwin Tools 30528 7/16-Inch Cobalt Alloy Steel 135-Degree - Left Handed-Mechanics Length-Bulk - Pack of 6 is made of M42 Cobalt Alloy Steel. The Cobalt Alloy Steel helps discipate heat, which is the killer of all drill bits, providing it with longer life and more durability. The Cobalt Alloy Steel construction allows this bit to drill abrasive materials like Stainless Steel and Cast Iron which are extremely tough on traditional high speed steel drill bits. The bit has a 135-degree split point tip to help eliminate walking as you start to drill the hole in metal. The straight shank works in both keyed and key-less chucks. The left handed cutting direction makes this bit ideal for drilling into broken fasteners to extract them. The left handed direction keeps the fastener from being driven in any further and sometimes the drill direction can extract the broken fastener without need an extractor.