3 Key Set of Hermle, Hamilton, Ridgeway, Howard Miller, Seth Thomas, Clock Winding Key #7/4.00mm, #3/3.00mm and #7/4.00mm Crank Key This is a German made unused Hermle Trademark clock key The #7/4.00mm key is for mantle or wall clocks that have hermle series 141,150, 151, 340, 341, 350, 351, 1050, 1051 movements in them The #3/3.00mm key will fit all Hermle series movements #130, 131, 132. The #7/4.00mm crank key is for Hermle grandfather movements #1161, 1171, 2061, 2071 This 3-Pack will allow you to wind any clock with a Hermle movement in it.