Product size:The product has an M14(14mm) internal thread. Applicability:This product is suitable for most angle grinders with M14 locking nut, and polishers,with a maximum speed of 80m/s. Easy to install:The backing pad has a nut and can be directly inserted, and the installation is very easy. This product is very suitable for fine sanding, and the flat is optimized for fine sanding applications Heavy duty pad design, extending the life of the pad. Product include a total of 3pcs Angle Grinder Backing Pads, which can completely meet your daily use needs and replacement Item Specifications Maximum Rotational Speed:80 m/s Compatible Devices:Angle Grinder, Sanding Machine Thread:M14 Colour:Black Material:plastic Size:Diameter: 180mm Package Contents: 3 x Angle Grinder Backing Pads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.