Eforcity8 Watch Back Case/cover Crystal Press/closer Watchmakers Jewelry Tool with 6 Dies Brand new and high quality This is a new case press These exclusive straight wall nylon dies will not scratch or mar crystals It measure approximately 5 3/8" x 3 5/16" x 1 3/8" (137 x 84 x 35 mm) Use for diameter 2.5 cm - 4 cm Watch case