This 5pc H.S.S left hand drill bit set makes it much easier to extract broken bolts and studs without having to pre drill first, as you would do when using a regular screw extractor. These bits have a 135 degree split point which makes it a self starting drill bit. To use these, you put the drill bit in your drill and start drilling the bolt or stud with the drill in reverse. In most cases, the bolt or stud will begin to back itself out. Sizes included: 1/8",3/16",1/4",5/16" and 3/8" drill bits. Comes in a pouch. This set extracts right hand bolts and studs up to 1".

SKU: 1217C