KD89 Nickel-Plated Steel Butterfly Winding Key for Clocks, Clocks, Old or Modern, Chimes, Music Box, Mantel Clocks, Comtoise, Ox's Eye (No. 4 = 3.25 mm)

• Nickel-plated steel butterfly winding key for clocks, pendulums, antique or modern, chimes, music box, mantel clocks, comtoise, ox's eye
• EXAMPLE: If your pendulum square is 4 mm, choose the No. 8 key with a 4.25 mm square so that your key fits properly into the square of your pendulum.
• 0 = 2.25 mm 1 = 2.5 mm 2 = 2.75 mm 3 = 3 mm 4 = 3.25 mm 5 = 3.5 mm 6 = 3.75 mm 7 = 4 mm 8 = 4.25 mm 9 = 0.0.000 177 mm 10 = 4.75 mm 11 = 5 mm 12 = 5.25 mm 13 = 5.5 mm 14 = 5.75 mm 15 = 6 mm
• Key outer diameter: 0-1 = 4.5 mm 2-3 = 5.4 mm 4-5-6 = 6.5 mm 7-8-9 = 7.5 mm 10-11-12 = 9 mm 13-14-15 = 10 mm

Nickel-plated steel butterfly winding key for clocks, clocks, antique or modern, chimes, music box, mantel clocks, comtoise, ox-eye