Compatible With: Suitable For most all rotary tools with a 3/4-12 thread Features: The set includes four brass tungsten guide rails with sizes of 0/40" (1mm), 1/16" (1.6mm), 3/32" (2.4mm), and 1/8" (3.2mm). These guides ensure concentricity and multiple offset options, enhancing grinding wheel efficiency. We've upgraded the material to aluminum alloy and applied CNC finishing for improved durability, eliminating concerns about high-temperature melting. You can easily interchange the four brass guides. Our tungsten sharpening tool features four angled holes at 22.5°, 20°, 15°, and 10° (corresponding to 45°, 40°, 30°, and 20° included angles). Precise control allows for optimal tungsten tip angle grinding with the upgraded tool. Additionally, our tungsten sharpening tool includes a tungsten cut-off port for processing. If your tungsten becomes worn or contaminated, you can use the cut-off port to trim it, extending its usability. The special hollow design simplifies grinding wheel installation. Give it a try! Specification: Type: Welding Electrode Grinder Material: Aluminum Alloy Fitment Type: Direct Replacement Package Included: 1PC Tungsten Electrode Angle Controller (Package No Rotary Tools Included) 1PC Connecting Rod 5PCS Diamond Wheel Note: Please allow slight 1-2cm difference due to manual measurement and a little color variation for different display setting.Note: *Sourced From Professional Aftermarket Manufacturer, QUALITY GUARANTEED.*