The BT01-QK monopod by Accu-Shot is our standard height Sling Stud Mount with QK01 Quick Knob. It is machined from 6061-T6 aluminum that is Mil-Spec Type III hard anodized. Each Stud Mount Monopod attaches to a traditional angled stock via the Sling Stud found on many common stocks and comes ready to attach to your gun using a common Sling Swivel. The Leg folds up and retracts, allowing the concurrent use of your sling. No tools are required. Every model is constructed of the finest materials and built to the highest standards right here in the USA. SPECS: Elevation Range: 3.50 – 4.65". Folded Length: 3.65" approximate. Weight: 6.5 ounces. MORE INFO: QK01 - QUICK KNOB – STANDARD - The Standard Quick Knob (QK01) allows quick, gross adjustments with the push of a button! The Knob has a spring loaded button that when depressed allows the operator to slide the knob up or down on the Actuator Rod quickly into the desired sight picture. When the button is released, the fine threads are re-engaged and the operator can make the final adjustments by rotating the Knob. The Quick Knob replaces the standard knob on BT01, BT04, BT08 and BT12 providing the same approximate range of elevation.