Package List - Watch kit set comes with a watch kit with 20 pcs fitting dies, Watch set - The watch tool is made of Stainless Steel + Aluminium, 20 assorted dies are made of ABS plastic material that not scratch or mar crystals. 20 dies from 18mm-50mm that can be use for most diameter watch Watch back remove tool - Both upper and lower are M6 threads, compatible for 5500A/5500C Great for closing your watch case after resizing or repair job. Easy & quick to fix watch - Only three steps - choose two suitable dies, screw them on the tool, and then down the handle. which means you have full control over the pressure used, it prefect to close case with our tool. Face down configuration means the repair person sees the case back being closed. Repair your watch by yourself - This is Good for closing your snap back watch case after repairing job. With these watch tools, you do not need to go to the jeweler's and it saves you money. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: Aluminum alloy + plastic colour: red+blue Package Contents: 1 x watch kit 20 x fitting dies Only 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.