SpecificationsLLz Installation method: Installation method: Put the sandpaper ring on the rubber stick and gently turn the screw with a screwdriver to expand the rubber piece, so that the sandpaper ring can be fixed on the stick. Material: sandpaper Package includes: 1/2 inch x 80 sanding belts 3/8 inch sanding bands x 80 1/4 inch sanding bands x 80 1/2-inch x 4 drum mandrels 3/8 '' x 4 Drum Mandrels 1/4 '' x 4 Drum Mandrels Free plastic box x 1 Package includes: 240 pieces of sanding belts in 3 diameters: 1/2 ", 3/8" and 1/4 ", 80 pieces per size; and 12 pieces of shank sanding drum in 3 diameters: 1/2 ", 3/8" and 1/4 ", 4 pieces per size; 252 pieces in total Convenient - Most common 120-grit, standard-size sanding belts are used to smooth curved surfaces and edges, polish soft and hard materials such as home improvement, artwork and woodwork Easy installation: drum mandrels with self-expanding rubber cushion, which make the sanding belts firmly glued to the mandrel and achieve a better finish; In the event that the sanding belt separates from the chuck while in use, make sure the drum has been screwed on tightly and fits snugly into the sleeve Note: Please wear professional safety glasses to protect your eyes, because maybe there is flying grits when the sanding drum rotates at high speed; The sanding drum will speed up faster on the metal surface, please replace the sleeves in time to achieve the best sanding effect Note: Please wear professional safety glasses to protect your eyes, because maybe there is flying grits when the sanding drum rotates at high speed; The sanding drum will speed up faster on the metal surface, please replace the sleeves in time to achieve the best sanding effect