【Premium Material】Close Mainspring Barrel Tool is made of durable plastic material, not prone to deformation even after multiple uses. 【Great Functionality】 Watchmaker Press Spring Winding Watch Repair Tool serves as an ideal pressure machine for closing box. 【Excellent Performance】 Close Mainspring Barrel is a great closer spring winding mechanism watch repairing accessory for watchmaker repairing. 【Easy to Use】Professional Press Closing Mainspring Barrel is with ergonomic design allows for easy operation, saving time and effort. 【Proper Size】Clockwork Repair Tool is in size 2.5cmx2cm/0.98inchx0.79inch, compact size, easy to carry and store without adding extra workload. Specification: Material: Plastic Size Chart: 2.5cmx2cm/0.98inchx0.79inch Package Includes: 1 Close Mainspring Barrel Tool Note: Please allow slightly errors due to manual measurement and different monitors.