Item Type: Watch Repair Tools Material: Steel Purpose: Watch repair, install gems on the watch Product Without Base Height: Approx. 13.5cm / 5.3in Mainly used for setting the depth of ruby and sapphire on the watch. Package List 1 x Jewelry Setting Machine 46 x Jewelry Hole 1The product made of selected materials, strong and durable, has a long service life. 2Tool design is reasonable, convenient and quick to use, and good performance. 3Professional watch tools, highly professional, suitable for repair shops and professionals. 4This tool is mainly used to set the depth of ruby and sapphire on the watch. 5With strict quality control and quality assurance, high safety factor, can be used with peace of mind.