Metal hand riveter for sheet metal fabrication. Complete with 4 interchangeable riveting heads to take 2.4mm /3/32″, 3.2mm / 1/8″, 4mm/ 5/32″ and 4.8mm 3/16″ rivets diameter. Fixing wrench included. Easy to operate. drill a 2.5mm hole in both sheet metal, insert a corresponding size 2.4mm blind rivet. Ensure the hand rivet head can fit snug to the rivet metal shaft and progressively retract the shaft by pumping the hand riveter handle until the shaft snap and detaches leaving the blind rivet firmly clamped and joining both metal sheets.