All-in-one kit: This MMOBIEL Watch Back Press comes with an assortment from 12 Nylon Dies allow for Size 50/48mm, 46/44mm, 42/40mm, 38/36mm, 34/33mm, 32/31mm, 30/28mm, 26/24mm, 23/21mm, 20/18mm. WATCH PRESS Repair Tool Kit Is made out of Superior Cast Metal and specialy made to Close the case of your Watch yourself in approx 15 minutes. Easy to use Latest Design Dies Snap On and Off Easy and fast on Press Tool. Material does not make marks or Scratches on Crystal Glass You don't need a technician to do it. Compatibility: Fit for almost all different sizes. Fit almost all Watches from 18mm up to 50 mm Diameter Product provided by MMOBIEL - We always try our best to exceed your expectations at every turn. Join the ever-growing list of satisfied customers and discover the difference with MMOBIEL.