Sander Pad Abrasive Mount Type Hook and Loop Abrasive Mounting Quick Change System Not Applicable Connector Size Not Applicable Connector Type Hook-and-Loop Backup Pad Shape Triangle Device Material Foam Density Medium Maximum Operating Speed 14 000 OPM Number of Vacuum Holes Non-Vacuum Color Black Overall Length 3 3/4 in Overall Width 3 5/8 in Overall Diameter Not Applicable Overall Thickness 1/2 in Compatible with Manufacturer Model Number 2531 M12 FUEL(TM) Orbital Detail Sander