The Locking version of our BT01 Accu-Shot monopod. Introduced in January 2002 this has become our best seller for good reason. With the Steel on Steel threads, it has all the same great features as the BT01 with the addition of a second Thumbnut. By jamming this second Thumbnut one can remove all of the tolerance found between the Male/Female threads. Or with a bit more pressure "lock" the Actuator knob. This is the model to buy for the highest degree of accuracy from your rifle from the Bench or in the field. Black only. Made in the USA. Approximate elevation range of 3.65 – 4.75” Approximate weight 5.6 ounces.