Abrasive Material: Aluminum Oxide, durable and anti-static. Ideal for sanding and polishing. Dimensions: 140mm*90mm. 5 pre-drilled holes for dust extraction. Backing: Hook and loop, easy and quick to stick, sturdy, durable and practical. For Many Applications: Assortment of abrasives in 7 different grit sizes (coarse to fine) to meet almost all your general polishing needs. Alumina Triangle Abrasive: Strong water resistance and can be used in both wet and dry environments, the newly developed adhesive improves the abrasion resistance and smoothness of the sanding sheets. Precise Application: Delta sanding sheets - even small and fine areas, such as hard-to-reach corners and edges, can be processed very easily and precisely. For optimal sanding results Versatile Use: Use our high-quality sanding accessories for fast and precise treatment of wood, paint, varnish, plastic, plaster and metal surfaces Includes: 84 sanding triangles in 40/60/80/120/180/240/320 grit (12 of each).