Velcro backing, easy to stick to the random orbital sander, but will not fall off when installed in use. -100pcs x 400 grit. These aluminum oxide sanding discs additive in the resin to resist loading, anti-static, effectively reduce the dust blocking, outstanding in durability.
TOPBRAS ABRASIVOS VINHEDO Abrasivos de Alta Performance Experiência, Competência e Qualidade