60 Grit Flap Disc: Blue flap discs are made from zirconia. Designed for high speed sanding and heavy duty removal, delivering fast and long lasting cut. SI FANG flap disc abrasive grinding wheels use high-temperature resistant plastic matrix, which increases the utilization rate of the matrix and saves 50% of the cost. 3inch Grinding Wheel High strength bonding agent for added durability and long life. Innovative design for reduced noise, Grinder grinding wheels are designed for grinding steel and stainless steel for added versatility. Reduced vibration for superior user experience. The 3inch x 3/8inch arbor angle grinding wheel can be safely used on power angle grinders, mini angle grinder cordless die grinder. 3'' x 1/16'' x 3/8'' Cut Off Wheels Our resin metal cutting discs set is made by low loss materials with sharp blade,in good shape with no broken edges. It is durable,safe and efficient, can be easily attached to the rotary tools. High-speed cutting of various small pieces of metal. Ideal for cutting all kinds of metal, cutting bolts or screws or removing rusted or stripped bolts and screws by making slots in them.