Now an easy way to lock your Harris “S” model(swivel) type bipod allowing you to level your rifle’s crosshairs with ease. The factory installed tensioning thumb knob is hard to adjust and lock with your fingers. Our bipod lock lever system replaces the tensioning knob to give you much better control and leverage to lock your firearm in a level steady position. The lever is easily re-positioned so it is out of your way when carrying the firearm. Very quick and easy installation.