Lightweight, compact size and slim nose projection allows this riveter to go wherever the work is. Four rivet nosepieces: 3/32”, 1/8”, 5/32”, and 3/16? store in handle. Ideally suited for blind riveting applications in aluminum windows, gutter and downspout. Not for use with 5/32? or 3/16? steel rivets (steel rivets larger than 3.2 mm). Spring return handles and comfortable contour grip make operation fast and easy. Just open handles and insert rivet into tool until flange touches nosepiece. Squeeze handles slightly to allow jaws to grip rivet mandrel. Insert rivet into pre-drilled work to be fastened and squeeze handles until mandrel snaps. Release grip on handles and mandrel will drop out front end of tool when tilted.