"A good item, suited to the purpose of preventing a 2 year old removing and losing the usual rack bolt key. Quality is questionable though as the mounting plate was not square to the operating splines, thus making operation bind when turning. managed to square it up myself to improve operation"
"The thumbturns supplied were terrible quality. One was bent, the other would not turn until a liberal application of penetrating oil to free it up. When fitted the real problem is shown though - the plastic washer binds against the metal back plate so you cannot turn them without using both hands as they are so stiff. If the back plate is not screwed and is allowed to rotate then they work fine, but the design as intended is fatally flawed. Even loosening the captive washer on the rear did not fix the plastic washer binding problem.