Keystone Mainspring Winder

Outstanding design features make this winder safe, fast, versatile and easy to use.

Features: Winds, unwinds, inserts or removes mainspring smoothly and safely. Adjustments are done by hand with no hooks, ratchet, or tools required. Safety clamp  holds mainspring barrels firmly while removeing or inserting without distortion or damage to the barrel. Adjusts to all barrel sizes then anchors firmly while removing or inserting without distortion or damage to the barrel. Adjusts to all barrel sizes then anchors firmly to the tool. Positive sliding lock handle allows turning in either direction. Handle locks by sliding the auxiliary post in place. Square chuck has a gripping range of 2 to 5m (#0 to #13 key size), with no damage to arbor. Can be mounted to a bench, wall or in a vise.

Complete with winder, barrel clamp, 11 retainers (sizes 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″, 1-1/2″, 1-5/8″, 1-7/8″, 2-1/8″, 2-3/8″, 2-5/8″ inside diam.), anchor pins for loop and hole-end mainsprings, 5 piece universal arbor set, 4 mounting screws, hex wrench and instructions.