Universal Watch Case Opener

Amazon

VERSATILE: This watch case opener has a universal wrench for opening and closing waterproof watches with screw case backs CONTENTS: Supplied with a handy storage case, this watch back removal tool includes a key for waterproof watch cases and 18 clamps: 9 round, 3 flat, 3 square and 3 triangle, Weight: 0.4850169764 pounds, Manufacturer: DK Tools

Zoro Tools

VERSATILE: This watch case opener has a universal wrench for opening and closing waterproof watches with screw case backs. CONTENTS: Supplied with a handy storage case, this watch back removal tool includes a key for waterproof watch cases and 18 clamps: 9 round, 3 flat, 3 square and 3 triangle.

ManoMano

Universal wrench for opening and closing waterproof watches with screw case backs. Key for waterproof watch cases with 18pcs of clamps: Round x 9 pcs, Flat x 3 pcs, Square x 3pcs, Triangle x 3 pcs. Supplied with storage case.