Brand New Watch Crown Winder Different Size Available Repair Tool Easy to hand wind up your watch. *Allows you to set the date quickly. Adjustable,8 size to apply to most watch crown.(Please don't forget to choose the size you interested in). Just depress the plunger on end and the jaws lock on to the crown of two tones andmen's presidential watches. Size available:{3mm,4mm,5mm,6mm,7mm Or 8mm},please let me know which size you interested in.. 100% New,Never Used Before.