The product itself is well machined, but beware that the QA on these is bad. I've bought 3 of these, and 1 of them was nowhere near a 6mm diameter hole. I bought it for my 2021 Warwick Thumb, and not only is the hole too small for the Warwick pot shafts, it's also too small for an EMG 6mm pot shaft. 2 of these I bought were absolutely fine though, so it's likely to be very poor batch QA from Warwick. If you must have an "authentic" Warwick part for your Warwick bass, prepare to go through a few of these before you actually get one which really is a 6mm diameter hole.