Watch Parts Repair Tools Bench Oyster-Type Back Case Opener Watchmaker Kits. Designed for professional oyster-type watch back case opening. Made of steel and wooden base, which is anti-corrosion and durable. This device can be used for opening and closing watch cases efficiently. Can repair maximum diameter in 65mm watch, suitable for most sizes of watch. Perfect tools for repairing the watch or replacing some broken accessories. Condition: 100% Brand New. Item Type: Watch Repair Tool. 30×25.5×11.5cm/11.8x10x4.5in. Suitable: for Maximum diameter in 65mm watch. 1 x Back Case Opener. 1 Bag of Accessory. 1 x Adjustable Bracket (#5674). 1 x Install Accessory (# 5675).