Heliburr Deburring External Chamfer Tool

The Heliburr Deburring External Chamfer Tool quickly repairs damaged bolts and thread nuts, saving you time and money. The HELIBURR simplifies the repair process, as well as bypassing the need to replace expensive or hard to find hardware while maintaining safety. Effective on: Stainless Steel Hardened Steel Mild Steel Copper Brass Aluminum Fiberglass Wood Plastic ATTENTION: Ineffective on Chrome-Moly (chromium and molybdenum). Some vehicle lug bolts are made with Chrome Moly, so please verify that the lug bolt is not Chrome Moly before using the Heliburr. This tool works by shearing the metal layer by layer. Using the lowest speed on your drill (50-400 RPMs), apply moderate pressure, and the tool will take care of the rest. Remove only the amount of material from the workpiece that you need, and you will preserve the life of your HELIBURR. Most repairs only require removing a single thread. The HELIBURR is a cutter, and just like a drill bit, it will reach the end of life depending on how you use the tool. Slow speed along with no unnecessary cutting and the use of cutting oil or another lubricant will ensure your HELIBURR's longevity. Refrain from turning every workpiece into a pencil, and you’ll keep the HELIBURR cutting edge sharp for much longer. Specifications: Tool Steel Effective up to Grade 8 SAE Fits size 8-32 bolts (.164) up to 3/4″-10 (.750) - (4mm -19mm) 100% Satisfaction Guaranteed