Harris H-SBRM Swivel Bipod with Notched Legs & Stud Mount 6" to 9"Bi pod Series "BRM: Fixed attachment to rifle (does swivel). Hinged base has tension adjustment and buffer springs to eliminate tremor or looseness. Attaches or detaches in seconds Positively will not change point of impact Quick folding or erection Attachment permits normal use of carrying sling Fits practically all bolt action rifles HS BRM: Swivel Head Standard Legs Extends 6" to 9" (H SBRM)