Features: -With 4 guides, 0.04 (10°), 1/16 (15°), 3/32 (20°) and 1/8 (22.5°), you can grind the perfect angle you need with precise control. -Suitable for most rotary tools with 3/4-12 threads. -Made of alloy with high hardness, corrosion-resistant, strong and durable. -Easy to use, just insert the welding wire into the grinding head and start the device, no complicated operation steps are required. -Welders can more on their work and increase productivity with this efficient tool in their work. Specification: Color: black&silver Material: alloy Size: 64.5*44mm .