Clock mainspring let-down tool with 6 double-ended sockets, giving 12 sizes in one kit.
⭐ At a glance
📏 12 sizes total, from 6 double-ended sockets
✅ Sockets marked for size, so you pick the right fit for your mainspring
📦 Includes handle plus all 6 sockets
✔️ New, unbranded
🔧 What it does & how to use
A mainspring holds a lot of stored energy, and letting it down in a controlled way is essential before you can safely remove or service a clock movement. This tool lets you release that tension gradually rather than risk the spring unwinding suddenly, which can damage the spring or the movement — and is a real safety hazard to hands and fingers.
Each of the 6 sockets is double-ended and marked with its size, giving 12 options so you can match the socket to the square on your mainspring arbor. Simply slot the correct socket into the included handle — they fit in and out easily — engage it onto the mainspring arbor, and use the handle to control the release, letting the spring unwind slowly rather than all at once. Suitable for clock repairers working across a range of mainspring sizes.
