This product is designed for use in any traditional fin box. The screw and holding plate hold your fin in place as per normal but the screw has a head on it, allowing adjustment of the fin position by manually hand-turning the screw, instead of needing to look for a screw driver. You can even adjust your fin position whilst out in the line-up, just turn your board over, loosen the holding screw with your hand and then move your fin in the fin box either forward or aft. Simply re-tighten the screw by hand and you are done!