It does not hurt the watch, it is made of high-quality materials, and it is sturdy and durable.The screw in the middle of the mold is more convenient and labor-saving, and is suitable for repairing watches, sealing cases, etc.Dies of different sizes can meet your different needs.A must-have tool for watchmakers and watch repairers.Simple and convenient to carry and use, it is better to put the tablecloth on the table when pressing it, so as to better protect your love tableType: ToolModel: capping machineFeatures: convenient and labor-saving, does not hurt the watchType: watch back coverItem Type: Repair Tools & KitsCap size: 18/20, 21/23, 24/26, 28/30, 31/32, 33/34, 36/38, 40/42, 44/46, 48/50color:SilverMaterial:Metalsize:8 x 7 x 9cmPackage Contents:1 x Capping Machine12 x plastic coverOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.