3M Hookit 255P+ Abrasive DA 150mm 6" Sanding Discs Gold15 hole x100. 3M Hookit abrasives are a range of high performance discs.Each product incorporates the Hookit fixing system, which when used in conjunction with a Hookit back up pad means it can be attached and reattached as many times as necassary. The 3M 255P+ system 15 hole discs and pads achieve better cut, less loading and a reduction in airborne dust. Anti loading benefits particularly with fine grades on difficult to sand top coats and primers. Available in a range of grades from P80 to P600.