Wolf British Racing Green 8 PC Winder. Lock-in dynamic cuff: Patented lock-in dynamic cuff ‘locks’ your timepiece into the rotator drum for a secure fit. Low density foam to accommodate all wrist sizes without putting pressure on your bracelet. 10 second start delay. Can be set between 300 and 1,200 TPD (turns per day). Double the amount of TPD by selecting bi-directional setting. Clockwise, counter clockwise and bi-directional.