3M™ Green Corps™ Hookit™ Sheet, 751U, is an aluminum oxide sheet constructed on an E weight heavy paper backing. Resin bonded for heat resistance, this sheet is great for smooth sanding on tough surfaces. The 3M™ Hookit™ Attachment System lets operators quickly change out sheets during multi-step sanding processes. The open coat construction means that the abrasive grains are spaced so dust and debris can collect in the spaces, rather than loading the sheet. Additionally, the open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade, for faster results. 3M™ Green Corps™ Hookit™ Sheet, 751U, features aluminum oxide blended with 3M™ Ceramic Abrasive Grain for a durable and long lasting abrasive. Perfect for moderate to heavy stock removal as well as sanding and finishing applications, ceramic abrasives are engineered to cut fast and handle intense heat and stress. Ceramic aluminum oxide blend surpasses aluminum oxide abrasives in cut-rate and durability, making this sheet an excellent choice for sanding metal, plastic and fibreglass substrates as well as finishing applications.