ITEM NAME:New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 3mm O9I7 New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 3mm O9I7 100% brand new It is spring loaded for ease of use,Adjustable, fit most watch crown High quality stainless steel handy tool for wind up your watch Excellent tool if the winder/crown on your watch is small and hard to wind, makes winding up all watches easier color: Silver Material: stainless steel Length: Approx.78mm Opening Diameter: 3mm Package Contents: 1 x watch crown winder Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.