feature:<br />-100% <br />-it is spring loaded for ease of use<br />-high quality stainless steel handy tool for wind up your watch<br />-excellent tool if the winder/crown on your watch is small and hard to wind｣ｬ makes winding up all watches easier<br />-adjustable｣ｬ fit most watch crown<br /><br />item specifics:<br />material:stainless steel<br />length: approx.78mm<br />opening diameter: approx. 3mm｣ｬ 3.5mm｣ｬ 4mm｣ｬ 4.5mm｣ｬ 5mm｣ｬ 6mm｣ｬ 7mm<br /><br />note:<br />1.please allow 1-3mm errors due to manual measurement.<br />2.due to the difference between different monitors｣ｬ the pictures may not reflect the actual color of the item.<br /><br />package included:<br />1 x crown winder