This CRL Makita® 7" (178 mm) Electronic Sander/Polisher maintains constant speed regardless of load variations, has a pre-set speed setting dial, and a lock-on button for continuous use at one speed. It is lightweight at 6.6 lbs. (3 kg), well-balanced for easy handling, and double-insulated for operator safety. Standard 5/8" (16 mm) 11 UNC spindle. This sander/polisher comes with a 7" (178 mm) hook and loop polishing pad. To use the CRL PSA sanding discs order Cat. No. PAD7. To use the CRL 7X78 Sanding Discs order Cat. No. 1929782 (pad) and 2245171 (locking nut).