Irwin Tools 30519 19/64-Inch Cobalt 135-Degree, Left Handed-Mechanics Length, Pack of 6

• M-42 Cobalt Construction for Durability in abrasive materials
• 135-Degree Split Point Tip for reduced bit walking
• Straight shank works in both keyed and key-less drill chucks
• Left-Hand Turn for drilling out fasteners without tightening down the fastener

The Irwin Tools 30519 19/64-Inch Cobalt 135-Degree - Left Handed-Mechanics Length-Bulk - Pack of 6 is made of M42 Cobalt Steel. The cobalt steel helps discipate heat, which is the killer of all drill bits, providing it with longer life and more durability. The cobalt 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.