Dimensions(Approx.): 7.8″ x 1.54″ x 2.64″, with adjustable spacing to suit most 6-hole diaries or organizers. Punches up to 6 sheets with 5mm diameter holes. Punched with 2 groups of 3 holes spaced 19mm; the distance between 2 groups is three position adjustable: 19mm, 51mm and 70mm. Tough metal working parts, extended service life, non slip base and easy to empty chip tray. Ideal for Filofax a5, personal, pocket size notebook, and create your own inserts.