Description: 20 pieces watch closer press dies included,each round shape dies contains 2 sizes . 20 assorted dies for watches with 28 sizes (18/20, 21/23, 24/ 26 ,28/ 30, 31/ 32, 33/ 34, 36/ 38, 40/ 42,43/45,48/50,47,35,20,25,30,35,40,45mm) Dies are made with highly plastic that won ’t cause scratches and marks on your watch face and cover Easy-to-use press that helps to snap on/off watch crystals and dies without risking any clamps on your hands and on the watch itself! Specification: Material: Plastic Round Dies Size Approx. 18/20, 21/23, 24/ 26 ,28/ 30, 31/ 32, 33/ 34, 36/ 38, 40/ 42,43/45,48/50mm Shield Dies Size Approx. 47,35mm Rectangle Dies Size Approx.20,25,30,35,40,45mm Package Includes: 20 Pieces Watch Case Back Press Dies