This is a redesign of the PTC Lock Snap that can be found on Repableshttp://repables.com/r/444/I really liked the original design of this clip, but the clip would not fit on this collet sold by Distech Automationhttp://www.dta-labs.com/products/bowden-couplerSo I redrew the design with a wider opening on the clip, and I also made the clip less thick.The clips holds the Collet up locking it in place. This takes the slack out of the Bowden tube for more precise retracts.