DARIT SMASH Professional 9.5 Inch Hand Riveter Pop Rivet GUN with High Carbon Steel comes with FOUR different sizes 240 mm 9.5" (2.4mm ,3.2mm, 4.0mm, 4.8mm ). A spring-loaded handle that makes loading rivets simple and a slip resistant grip for precise rivet placement . All-steel construction for durability makes it ideal for heating and cooling ducts. Extended nose makes work easier in hard-to-reach places making it a great tool for general purpose rivet tasks, such as gutters, furniture and canvas works. New bumper design absorbing the cutting force of each hit .Anti-slip handle make work easier and improve user's work efficiency . MAINLY USED FOR THE CONNECTION OF FASTENING OF METAL,FIBER LEATHER & PLASTIC MATERIALS.