Features and Benefits: Made from rugged, high carbon steel to handle the stress of removing bolts Extractor size and recommended drill bit size are etched on each tool for easy identification Ideal for soft materials or thin-walled pieces such as pipe and fittings Will not expand soft material being removed resulting in easier removal Able to remove left-hand bolts as well as right-hand bolts Method of use: After drilling hole with either right or left-handed drill bit, (left is recommended) insert extractor, turn counter clockwise Grips into sides of drill hole and removes broken part without damaging the threaded hole Specs: Recommended tap wrench: TR-98 Use drill size: 5/16" Removes bolts and screws: 1/2 - 9/16" and 1/4" NPT, 12mm - 14mm, 1/4" BSP Carded