Capacity: - Diameter 5 mm alu rivets. - Diameter 4 mm steel rivets. Grips shaped for optimum comfort. Return-spring to closed position prevents loss of rivet. Cushioning system when pin snaps. Supplied with 3 nosepieces for diameters 3 to 3.2 mm - 4 mm - 4.8 to 5 mm. Knurled nosepieces for hand-fitting.