19 Clock & Watch Keys 3 Clock KeysThis is a new set of 3 clock keys. These are used for winding grandfather clocks.You receive: One size 9 clock key with a 4.5 mm hole. One size 5 clock key with a 3.5 mm hole. One universal clock key Two 5 Sided Clock KeysThis is a new set of two 5 sided clock keys.The sizes are: Size 2, 2.75 mm. Size 3, 3.00 mm. Size 4, 3.25 mm. Size 5, 3.50 mm. Size 6, 3.75 mm. Size 7, 4.00 mm. Size 8, 4.25 mm. Size 9, 4.50 mm. Size 10, 4.75 mm. Size 11, 5.00 mm 14 New Pocket Watch Winding Keys. This is a new set of 14 pocket watch keys. These keys are used for winding pocket watches.You receive: One 00 size watch winding key. One 0 size watch winding key. One 1 size watch winding key. One 2 size watch winding key. One 3 size watch winding key. One 4 size watch winding key. One 5 size watch winding key. One 6 size watch winding key. One 7 size watch winding key. One 8 size watch winding key. One 9 size watch winding key. One 10 size watch winding key. One 11 size watch winding key. One 12 size watch winding key.