![Large Winged SE Clock Key 4.50mm (10591790607)](http://perrinwatchparts.com/cdn/shop/products/74.262-6to16-300_f4867d11-c015-402c-bf04-c34817eef61c_300x300.jpg?v=1595351426)
Large Winged SE Clock Key 4.50mm is a single ended clock key made of brass. A Large Winged Single End Key 4.50mm does not have a logo printed on the key and fits a winding arbor square of 4.50mm. This equals a key stamped with the number 9. The large wings on this key allows the user a better grip when winding a clock.