The fastest, easiest and most accurate way to insert miniature nails! All you do is insert the nail into the steel tube, position it and give the handle a slight push. The spring loaded mechanism does the rest. Model builders use this tool for fastening planking on model sailing ships, laying track for model railroads and building wooden model structures. Carpenters use it for fine small joinery. Tool features solid steel construction for years of service. Smooth wooden handle fits comfortably into the palm of your hand. 5-1/2" long. For nail heads approx. 1/16" diameter.