Upgrade your sanding experience with this 20-piece sanding drum kit. The kit includes 4 rubber drums with diameters of 1/2 in. 3/4 in. 1 in. and 1-1/2 in. and 8 sanding sleeves each in grit 80 and 120, along with a tool-carrying case. The drum bits are made of rubber and stainless steel, with sander sleeve abrasives crafted from aluminium oxide, ensuring uniform grit, sharpness and durability. The drill has a 1 in. long steel shank that fits 1/4 in. tools, such as drill presses, spindle grinders and hand drills. It's ideal for sanding holes, contours and irregular shapes, with a maximum operating speed of 3000 rpm/opm. Installation is easy: just put the sandpaper ring into the drum sander and tighten the screws. These sanding accessories are widely applicable for grinding and finishing metal, non-metal, wood, plastic, stone and glass. With different sizes available, they can meet all your polishing needs, making your sanding jobs more efficient and convenient.