The Nes Threadmate External Thread Repair Tool is a universal external thread repair tool. This easy-to-use tool operates by adjusting the knob that sets the proper diameter of the tool to the thread and the blades float to the correct pitch. Once the tool fits into a good thread slot, the user begins repairing the threads by simply rotating the tool towards to damaged threads. Comes equipped with blade made from hardened high speed steel. UNIVERSAL TOOL: Ideal for external thread repair as the tool only requires one hand to repair inch or metric, right or left handed, coarse or fine threads. VERSATILE: No need for a caliper or pitch gauge to determine diameter or thread count or type. QUICK ADJUSTMENT: Threadmate tool adjusts and quickly adapts to the diameter and pitch of fastener thread. HOW TO USE: Automatically follows good threads and the cutter repairs damaged threads. QUALITY OF CUTTERS: Blades are made of High Speed Steel induction hardened to 58 Rockwell for longevity of life. SPACE AND TIME SAVING: Takes the place of hundreds of dies, assorted thread chasers and thread files.