You need a watchmaker's screwdriver set for that. Pull out the lid (screwdriver top), you can find 3 screwdriver bits inside the screwdriver handle, which provides you with more choices. 1 x Watch Press & 12pcs Nylon Dies.
eBay
Rubber grip pliers. Watch case opener knife for opening press type watch backs. DIY Flat Belt Screw Leather Craft Chicago Nail Brass Solid Rivets Stud Head I. Spring bar tool and link pin punch for watch band repair.
eBay
1 x Crown Tube Tool. Special designed for easily removing watch crowns tube. Fit for Rolex watches. Suitable for watch makers and watch repairing workers to use. High precision and reasonable design will not scratch your watch surface.
eBay
147 Pcs Watch Repair Tool Kit Remove Strap Opener Adjustment Watch Repair Kit.
eBay
Professional Watch Back Case Opener Remover Watch Screw Repair Tool Kit Box. 1x Wrench and 6 size of grooved check(rings). Open the watch case for repair without any scratches, easy to use and carry. Product role: for opening the back case of the watch.
eBay
Rimuovi link e pin dell'orologio, salverà il per tuo viaggio A dal gioielliere per quando devi regolare o pulire il cinturino dell'orologio link & pin. Materiale: lega di alluminio. 1 × Band Link Pin Remover.
eBay
5mm Carrying Case Size: 20.5cm x 10.5cm x 5cm/8 x 4 x 2" Color: just as the pictures show Approx. Baby Products. Health & Beauty (5). 3x Precision Anti-magnetic Screwdrivers (1.2mm, 1.4mm, 1.6mm) 3x Pin Punches (0.8mm, 0.9mm, 1.0mm) 1x Carrying Case.
eBay
Quantity: 1 set(147pcs). Adjustable Case Opener - excellent for opening waterproof cases up to 34mm. Anti magnetic screwdriver for removing battery covers. 1x Adjustable Case Opener. 18x Adjustable Case Opener Pins.
eBay