Punch Lock Riveter. To join metal section sheets used in dry walling for dividing walls and drop ceilings, without needing screws or rivets For U- and C-shaped sections with max 1.2 mm metal (2 x 0.6 mm) Minimum handforce required due to optimum lever transmission.Capacity half-moon Capacity in square millimetres Square drive Capacity square Capacity step-like square Capacity triangular Clamping width hexagon Clamping width round Clamping width square Clamping width