3M hook and loop disc pad holder is designed for metalworking projects and LGB discs. The disc pad holder provides firm support so that heavy duty and super duty LGB discs can weld grind and blend with faster and more efficient productivity. 3M disc pad holders allow you to quickly and easily change abrasive discs during multi-step projects. 3M hook and loop disc pad holders have a center hole with internal threads - choose the thread size that matches the external thread size of your right angle grinder. T-shaped hooks securely hold a surface conditioning disc and provide quick and easy disc attachment, removal and reattachment. The hook and loop feature enables the disc to be used and re-used for the extent of the abrasive life. Discs are sold separately. Our hook and loop feature makes disc attachment, removal and reattachment easy and facilitates use and re-use of the disc for the extent of the abrasive life. Our disc pads have T-shaped hooks of the type most commonly used in hook and loop applications. These disc pads grip the loop backings of hook and loop discs and provide a finer finish than do adhesive backed discs. Hook and loop systems are designed for work spaces where adhesive backed discs may become contaminated by dust, dirt or flying debris. Scotch-Brite surface conditioning discs and light grinding/blending products (sold separately) deburr, clean, blend and finish a wide variety of materials. Using surface conditioning products with a 3M disc pad holder generates finishes suitable for paint.