Mudder High Torque Hands Clock Mechanism, 3/10 inch Maximum Dial Thickness, 4/5 inch Total Shaft Length (Black) I shaft, drive long clock hands (10 mm to 450 mm) Suitable for repairing, replacing or making a clock Applicable to cross-stitch, three-dimensional embroidery, craft clock, frameless draw clock, etc. Total shaft length is 20 mm (4/ 5 inches), thread length is 11.7 mm (9/ 20 inches) High torque clock mechanism, suitable for 4 - 8 mm (4/ 25 - 3/ 10 inches) thickness clock panel