With these pliers, first make an appropriately sized hole for the selected eyelet. Then set the required eyelet punch, insert the eyelets and press them together. The pliers are equipped with three punches with diameter 4.0 mm / 4.5 mm / 5.0 mm and three matching eyelet punches with diameter 4.5 mm / 5.0 mm / 5.5 mm. Nickel-plated surface, ergonomic plastic handles.