Universal Clock Key For Winding Grandfather Clocks

Universal brass clock key with 5 prongs for winding clocks. The universal clock key covers most all the clock key sizes. The Even Sizes include:  3.25mm - 1/8 in (4), 3.75mm - 0.14 in (6), 4.25mm - 11/64 in (8), and 4.75mm - 3/16 in (10). 5.25mm 1/5 in  (12) Measurements are approximate. Universal clock key Used to wind most clocks Even sizes: 5 prong Brass key Sizes: 3.25mm 1/8 in (4), 3.75mm 0.14 in (6), 4.25mm 11/64 in (8), 4.75mm 3/16 in (10)

5.25mm 1/5 in  (12)

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