No1/0(2.40mm)Steel clock Key

No1/0 Solid Steel high quality Clock Key with a deep winding square & thicker, stronger handle. Ideal for French clocks, Bracket Clocks, Wall Clocks & traditional wooden Mantel Clocks. All of the key is manufactured in our workshops in Derbyshire, England.

The size listed refers to the distance between the flat section inside the winding square.