Extends from 9" to 13"; Direct attachment to a Picatinny Rail only; Swivels (tilts) to compensate for uneven terrain; Notched Legs are spring loaded for fast deployment; Has a built-in sling swivel stud to attach the sling; Heat treated steel and hard alloys; Hard rubber leg caps; Polymer knob; Ideal for prone position or benchrest; Ultralight weight (13.5 oz)