material: Made of , practical material for long lasting use. Stable installation: Features a threaded design for stable and secure mounting. Efficient grinding and polishing: Specifically designed to reach local gaps that are inaccessible to typical angle grinders or polishing machines, enabling grinding and polishing with ease. Easy removal: Notches and wrench compatibility allow easy removal; suitable for 100 type angle grinders and polishers. Use scenarios Automotive : Reach tight spots around welds and joints on vehicle panels where standard grinders cannot fit, for grinding and polishing with control. Metal fabrication in confined spaces: Finish inner corners and narrow areas on brackets, gussets, or housings that are difficult to access with conventional tools. Plumbing and piping work: Polish inside narrow channels or around pipe joints and seams, improving finish in confined locations.