The BT66 Atlas 5-H BAS Ski Feet are another example of us learning how our products are used and what end users want in order to get more out of our products. Starting with 3.5" 6061-T6 bar stock, these monsters are made to slide in both the 90 and 45 degree leg positions. They are easily installed with the press of a stainless steel plunger to the 5-H model Atlas Bipod. Sold as a pair.