Clock Mainspring Let-Down Tool Set (4-Piece) – 3.5–5.25 mm | Safe Clock Repair

This 4-piece clock mainspring let-down tool set is an essential safety tool for clock repair and servicing. Designed to safely release tension from clock mainsprings before disassembly, this set helps prevent sudden unwinding that can damage movements or cause injury.

The set includes a comfortable handle and three interchangeable chucks sized to fit mainspring arbors from 3.5 mm to 5.25 mm, covering the most common wall, mantel, and grandfather clock movements. Precision-machined for a secure grip, each chuck allows controlled power release when letting down a wound spring.

Ideal for professional clockmakers and serious hobbyists, this tool set is a must-have for safe mainspring handling during cleaning, repair, and restoration work.

Includes:

-1 ergonomic handle

-3 interchangeable chucks (3.5 mm – 5.25 mm)

-Designed for safe mainspring power release

-Suitable for mechanical clock movements