This hand held fastening tool can snap two substrates together quickly by inserting small-size button-end fasteners made of stretchy polyurethane material. These button type fasteners are perfect for tough applications.and are available in short 1/4inch and long 3/8 inch lengths and come in natural or black colors. It's uses include pleating, bar tacking, spacing, closing or joining. Ideal for the automotive industry to attach spacer blocks inside the weather stripping doors.