Twist Lock Mounting Base to Fit on any Picatinny/Weaver Rail; Superior Construction with 20% Larger Mounting Deck; Heavy-duty Full Metal Construction to Meet Harshest Requirements; Extendable Legs with Spring Tension & Lockable Collar for Most Secure and Flexible Adjustments; Reliable, Finger Friendly Posi-Lock Control for Bipod Leg Folding and Un-folding; Complete with Swivel Stud Kit for Use in Swivel Stud Mount Applications; Unique Non-slip Rubberized Foot Pads for any Terrain or Surface; Center Height Adjustable from 8.7" to 10.6"; Leg Length Extendable from 9.5" to 11.5"