Centring Pin Springs are interchangeable stainless steel springs that attach to hook eyes and allow any soft plastic bait to be "permanently" secured by inserting the pin in the centre of the bait's nose and then screwing the bait onto the coil spring to rig perfect every time. These springs are featured on Owner Twistlock hooks. When compared to barbed stick-pin holders, the CPS provides a far stronger grip. Any size bait can be held securely in any one of four sizes. To accommodate Elastomer baits, which are often challenging to rig, slim variants have been created. Rigging is made easier with the Slim variants thanks to smaller diameter wire, a sharp leading point, and fewer spring turns.