The Columbia Nailspotter is a big improvement in screw finishing. It has the option of having wheels or the traditional skid plate. It is light weight and has an easy to adjust thumb screw for swivel tension. By far the best Nailspotter on the market . FEATURES: Available in 2" and 3" sizes Hand made from U.S. billet aluminum and steel components Machined in Columbia's state of the art facility in Canada Columbia Nail Spotters