[Specification] - Watch crown winder tool open diameter 7mm, length diameter 80mm, width 9mm. [Durable to Use] - The watch crown winder is made of carbon steel, wear-resistant, not easy to rust, long service life. [Precision] - A black oxide precision nut driver of the watch crown winder can securely hold the small size nuts when installing. [Convenience] - The watch crown winder is easy to use and save your fingers with this handy helpers. [Widely Used] - The watch crown helper is suitable for repairing watch and easy winding of mechanical watches. 1. The watch crown winder adopts premium metal construction, anti-rust and stable.
2. The watch crown winder is of accurate precision and better fit for different sizes of crown when installing.
3. Crown winding tool for easy winding of mechanical watches.
4. Watch crown winder make it easy to use and save your fingers with this handy helpers.

Specification:
Material: Carbon Steel
Handle Finish: Chrome Plated
Winder Finish: Black Oxide
Length: 80mm / 3.14 Inch
Width: 9mm / 0.35 Inch
Opening Diameter: 7mm
Function: Repair Watch, etc

Package Content:
1 x Watch Crown Winder