The Voile Heavy-Duty Mountaineer 3-pin is a solid, light touring, telemark and backcountry touring binding * 3-pin bail height to accommodate a 18 -19mm thick duckbill 75mm boot. You can use this binding with virtually any telemark boot available. Mostly suited for mid-range to light duty boots. * Heel bails (aka climbing bars) of 48mm and 58mm available separately