![http://www.smallrig.com/product_images/h/285/Thumb-Screw_V2_2pcs_Pack_with_14_inch_thread_1089-SR-4__33118.jpg http://www.smallrig.com/product_images/h/285/Thumb-Screw_V2_2pcs_Pack_with_14_inch_thread_1089-SR-4__33118.jpg](https://cdn11.bigcommerce.com/s-yek8lz/images/stencil/300x300/products/885/31118/Thumb-Screw_V2_2pcs_Pack_with_14_inch_thread_1089-SR-4__33118__47268.1513655768.jpg?c=2)
SMALLRIG Thumb Screw comes with 1/4 inch thread features a stopper under the last thread as follows, the stopper stops the screw after the top 4 threads go into thread hole. High quality workmanship
Made from copper with black chromium electroplating surface.