(Blue one): Feature: - Made of cast metal to ensure strength, can press closer enough to your watch. - Snap-on system allows dies to snap on and off quickly, with spring-loaded lever, easy to use. - Face down configuration means the repair person sees the case back being closed. - It comes with an assortment of 12 dies to allow for all size watches. - Die size: Internal diameter - External diameter: 15-17, 18-20, 21-23, 24-26, 28-30, 31-32, 33-34, 34-44, 36-38, 40-42, 43-45, 48-50 mm / 0.59-0.67, 0.71-0.79, 0.83-0.91, 0.94-1.02, 0.10-0.18, 1.22-1.25, 1.30-1.34, 1.34-1.73, 1.42-1.50, 1.57-1.65, 1.70-1.77, 1.89-1.97 inch. Type: Repair tool Material: Metal Package weight: 0.676 kg Package size (L x W x H): 17.00 x 8.00 x 14.00 cm / 6.69 x 3.15 x 5.51 inches Package Contents: 1 x Watch Case Presser, 12x Die (Black one): Main Features: - Snap-on system which can snap the dies on and off quickly and easily. - Revolving watch back cover presser is made of cast metal, very durable. - Dies are made of plastic which can protect your watch well. - 12 dies with 8 sizes, 24 mm, 28 mm, 30 mm, 31 mm, 34 mm, 36 mm, 40 mm, 42 mm, suitable for all watches. Color: Black Material: Metal Type: Tools 0.392 Package weight: 0.432 kg Product Size(L x W x H): 7.90 x 4.50 x 10.90 cm / 3.11 x 1.77 x 4.29 inches Package Size(L x W x H): 11.30 x 10.20 x 6.50 cm / 4.45 x 4.02 x 2.56 inches Package Contents: 1 x Watch Back Cover Presser Closer, 12 x Dies