Press-N-Snap Hand Tool Boat Snap Tool Lightweight Aluminum
My personal favorite.
Features - Versatile and easy to use. Lightweight and durable. It is capable of setting numerous brands of fasteners, simply by changing the dies. Rubber ring is replaceable individually., Lightweight aluminum tool sets snaps into place with a simple squeeze. Each unit comes complete with setting dies for Dot durable and Dura snap fasteners. Rubber ring holds one part of the fastener for one handed operation.
Uses - Ideal for tarps, convertible tops, tents, boat covers and canvas jobs.