This Festool 25/32″ Half-Blind Dovetail Template is for 25/32″ (20 mm) wide half-blind dovetails in material 13/16″ – 1 3/32″ (21 – 28 mm) thick. Includes flanged 24 mm copy ring (490771) for OF 1010 router. Please specify if ordering for OF 1400 router, which requires copy ring (492182), shipped at no additional charge.