ITEM NAME:New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 3.5mm N6O1 New Hand Watch Crown Winder Helper Mechanical Winding Repair Tool 3.5mm N6O1 100% brand new It is spring loaded for ease of use 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 Adjustable, fit most watch crown color: Silver Material: stainless steel Length: Approx.78mm Opening Diameter: Approx. 3.5mm Package Included: 1 x 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..1 x Crown Winder. Excellent tool if the winder/crown on your watch is small and hard to wind, makes winding up all watches easier. High quality stainless steel handy tool for wind up your watch. Adjustable, fit most watch crown.