50 pieces of universal size – It contains 50 pieces of sanding triangles with Velcro fastener of size 140 x 140 x 100 mm and 5 dust holes, which are suitable for effective dust extraction of Tack life multi-sander and other 140 mm multi-sander/triangular sanders/delta sanders. 5 types of grit for versatile applications - 10 pieces of each are sanding sheets of 40/60/80/100/240 grit, which are different from coarse, medium, fine, extra fine, thus meet more your requirements, such as for the fine, score-free sanding of wood and metal, also paint, and rust removal.