Poms are Carving Disc for Angle Grinder This wood grinding wheel consists of hundreds of pointed teeth that remove residue or hard material quickly, which are more durable than sandpaper pads, saving your energy and improving the efficiency of your work. The angle grinder attachments set includes: 3 pieces of wood grinding wheel (4" dia * 7/8" bore), 3 pieces of silver bushing(7/8" to 5/8") Shapes as shown in the picture: Flat, Curve, Inclined. Safety Instructions 1. Read attached manual before using this product to prevent injury. 2. Do Not install a carving disc on any grinder that requires mechanically modifying the safety guard to achieve proper positioning. 3. Wear goggles and heavy-duty work gloves during set up. Unplug the tool from its electrical outlet before performing set up procedures. 4. Do Not Carve wood containing foreign objects. Remove all screws and staples before using the carving disc. 5. Store indoors out of children's reach. Compatible with most angle grinders, such as Makita, Bosch, Dewalt, Black & Decker, Milwaukee, Hitachi & more. How to choose the bore size of the grinder disc for wood? 2 Bore Sizes: 7/8"(22mm) & 5/8"(16mm) 7/8" is more suitable for regular 4", 4 1/2" and 5" angle grinder with 5/8-11 shaft. The stump grinder wheel set also comes with reducing bushings, which can reduce the bore diameter to 5/8" to fit the M10 angle grinder shaft. Compared with other similar products, the new design increases the versatility of the wood grinder wheel.