1 1 2.4 or 3.2mm 3.2mm SP AIR TOOLS "2.4 & 3.2mm Rivets "4.0mm Rivets 4.0mm 4.0mm Copper Nosepiece" Black Nosepiece" "IMPORTANT: Must use the correct nosepiece with the correct size rivet. Copper Nosepiece: 2.4 & 3.2mm Aluminium Rivets Black Nosepiece: 4.0mm Aluminium Rivets Silver Nosepiece: 4.8mm Aluminium Rivets" "IMPORTANT NOTE: If the correct nosepiece is not used with the correct rivet sizes. Warranty may be Void." "4.8mm Rivets 4.8mm 4.8mm Silver Nosepiece" 226