5" Wet Variable Speed Polisher (with GFCI Breaker, 900W, 500-4500 RPM). We always attach the lock ring nut with the polisher (Not many seller do it). The lock ring nut is for you to use this polisher with cup wheel and saw blade. 1 Year Warranty. We usually attach some small free gift (like 2 piece of polishing pad and 1 piece pad holder).