【Excellent Tool】Rotary Lock Backing Pad for 2" (50mm) Sanding and Polishing Discs 【Sturdiness】Round sanding disc holder made of high-quality rubber base and nickel-plated steel shank, sturdy and durable 【Compatibility】1/4" (6mm) shank lock disc holder, suitable for most rotary tools and electric drills 【Ingenuity】Swivel knob design, rotates to easily attach or remove the sanding pad for quick replacement 【Practicality】Practical sanding accessory, suitable for surface treatment such as grinding, polishing, deburring and rust removal of various items