Long Shank Brass Clock Winding Crank Key - Longcase Grandfather - Size 00 to 12

Brass crank-style clock winding key with an extended long shank, made for grandfather and longcase clocks rather than mantel or bracket clocks.The longer pipe on this key is designed to clear the clock hands as you wind, which is why longcase clocks need this style rather than a short butterfly key. Size 4 — round German-made movements Size 8 — most post-1960 German-made square movements Size 7 — American time-and-strike movements, circa 1875-1940s Check the size stamped on your winding arbor (the square shaft the key fits onto), or measure it flat-to-flat with a calliper, then match that figure to the size chart below and select that option.The details Style — long-shank crank key with three-lobed wing head and two finger holes Material — brass Use — longcase and grandfather clocks, and any movement with a matching square arbor Sizing system — European/metric, rising in 0.25mm steps from size 00 Available sizes — 00, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 (2.00mm to 5.25mm across the flats) Quantity — one key per purchase, select your size from the options Before you order — sizing runs on two different numbering systems, American and Swiss/European, and they don't align at the same number. This listing uses the European/metric chart above, so if your old key or clock paperwork quotes an American size, measure the arbor rather than matching numbers directly.