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 , it is better to put the tablecloth on the table when pressing it, so as to better your love table Type: Tool : capping machine Features: convenient and labor-saving, does not hurt the watch Type: watch back cover Item Type: Repair & Kits Cap size: 18/20, 21/23, 24/26, 28/30, 31/32, 33/34, 36/38, 40/42, 44/46, 48/50 color:Silver Material:Metal size:8 x 7 x 9cm Package Contents: 1 x Capping Machine 12 x plastic cover Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.