The flap disc is made of high-density and thickened industrial-grade alumina abrasive, which are durable, heat-resistant, moisture-resistant, anti-static, and anti-clogging. You can use it for a long time. Each grinding disc measures at 4-1/2-inch diameter with a 7/8-inch arbor size, making it compatible with most 4.5 inch brand angle grinders, such as Dewalt DWE402, DCG414B, Makita 9557PBX1, GWS8-45, Craftsman CMEG100, Bosch 1375A, PORTER-CABLE PC60TAG, PCE810, Black & Decker BDEG400, G950, Hitachi G12SR4, and More.
Using tips:
40 grit flap disc is coarser in build and ideal for heavier stock removal.
60 grit flap disc is ideal for grinding on kinds of work surfaces, like wood and metal.
80 grit flap disc is suitable for grinding, deburring, and light grinding.
120 grit fine flap disc is perfect for finishing work on surfaces like wood.
NOTICE: Please Wear Protective Equipment Before Use!
Product Specification：

Item Name: Flap disc, angle grinder attachments, angle grinder sanding disc, grinding disc, flap wheel
Quantity: 28 pack in total, 40 grit x 7 pcs ; 60 grit x 7 pcs ; 80 grit x 7 pcs; 120 grit x 7 pcs Grade: 40/60/80/120 grit
Material: Premium aluminum oxide abrasive
Size: 4.5 inches in diameter with 7/8 inch arbor
High speed of 13,300 revolutions per minute (RPM)

Take the 28 pack 4.5 inches flap discs home today. Bulk Purchase saves time and money!
Assorted Grits Flap Disc Pack: The 28-pack flap disc 4 1/2 inch set is a great value set. 40/60/80/120 grit, 7 pack of each grit. Meet all your needs of grinding from coarse to fine or removing rust and paint from metal, wood or plastic surfaces.
Heavy-duty and Long-lasting Material: Angle Grinder Attachments are made of high-density and thickened industrial-grade alumina abrasive for strength and long service life. Durable, heat-resistant, moisture-resistant, anti-static, and anti-clogging.
Durability and Reinforcement: Angle grinder sanding disc is bonded with fiberglass backing to absorb tool vibration, absorbs vibration without smear during use, bringing more stable & efficient grinding.
Wide Compatible: Each flap disc measures at 4-1/2-inch diameter with a 7/8-inch arbor size, compatible with grinders operating up to 13, 300 RPM, fits for most air and electric grinders.
Wide Application: Flap disc assortment can be used for all kinds of projects, ranging from metal and woodworking, concrete grinding and finishing, stone smoothing and finishing, to rust removal. It perfectly grinds anything you need for your projects.