I bought a bike jack from them for about the same price, I wouldn't do any heavy wrencing on it, but great for detailing. It seems to be a copy of the sears lift that goes for $120. and got a 2 year warrenty for 20 bucks more. Sears doesn't cover theirs. ( I know you asked about a chock) I know 2 people with these that have had no issues with them.