Masar Watch Opening Tool Key for Rolex/Tudor (Notched Back)

Watch Case Opener Tool

The Masar Kit is a professional set designed for precisely opening and closing screw-down watch cases . Compatible with Rolex Oyster and Tudor cases, it includes a robust key and six milled dies made of hardened steel. With this key, you won't fall asleep while opening a Tudor watch —efficiency and precision guaranteed.

Kit contents

• 1 key for RX Oyster cases.
• 6 milled dies (tooth diameter, outer edge): Ø 18.5 mm, 20.2 mm, 22.5 mm, 26.5 mm, 28.3 mm, 29.5 mm .
• Dies lubricated with a special lubricating oil for smooth and durable operation.

Features

• Hardened steel dies : wear resistance and long-term stability.
• Oiled finish : reduces friction and improves rotational accuracy.
• Note : the dimensions indicated correspond to the outer edge of the teeth.
• Quality : premium tool, robust and perfectly fitted.

Compatibility

Designed for Rolex Oyster and Tudor watches, this kit is also suitable for other screw-back watch models whose case dimensions correspond to the diameters of the dies provided.

Use

• Choose the matrix that corresponds to the diameter of the case base.
• Attach the matrix to the key, position it on the bottom, then perform a smooth and controlled rotation.
• Work on a stable surface to avoid any scratches or slipping.

Interview

• Clean and dry the matrices after each use.
• Keep the tool away from moisture and dust.
• Replace the dies if they show signs of wear.