Check the listing for details. ATLAS TENSION WRENCH - Pattern One - BLACK. Condition: New. Listed at 39.99 USD. With well over 100,000 Atlas Bipods sold over the last decade, the Atlas Bipod has been proven to be the best competition bipod on the market. It’s lightweight design and infinitely adjustable legs make it the go-to support for precision rifle shooters. However there is one drawback for competitive shooters: the dreaded tension knob. The Atlas tension knob was designed to adjust with your fingers to allow a smooth pan and tilt, and it works... for the first few shots, then it tends to loosen up. We have the solution... the Atlas Tension Wrench. With a simple turn of the wrist, the ATW puts the exact amount of friction you want on your tension knob. You can either lock the head down completely or back it off a little and enjoy frictioned movement that won’t come loose. Atlas Tension Knobs have had different shapes over the years. Pattern ONE features five lugs with a shallow relief cut in between. These knobs were used in the older BT-10 V7 Atlas bipods. (circa 2009-2015)