I just wat to throw out a kudo for RAD. I made a first time purchase of 2 3packs of Rival 125s. When I put all of them together, one of the heads was missing the tiny set screw that holds the one of the blades in place. I called RAD and asked if they could send me a set screw. The lady I talked to on the phone was really helpful and nice and said she would send it ASAP. Two days later I received a new $38, 3 pack of Rivals in the mail. Great customer service and way to back up your product. Thanks