ITEM NAME:New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 4.5mm P9W8 New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 4.5mm P9W8 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: 4.5mm 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..Excellent tool if the winder/crown on your watch is small and hard to wind, makes winding up all watches easier. It is spring loaded for ease of use,Adjustable, fit most watch crown. High quality stainless steel handy tool for wind up your watch.