Some time ago I tried to take the chuck off a 3/8" Bosch drill. Trying to turn the screw the wrong way, I ruined the head. Took it to a Bosch service center where they removed it for me and gave me a new screw. While I waited. Recently bought one of the new radio CD players. It quit after about 6 months. Sent it in to Bosch. Got a new one within 10 days. I like Bosch!!