These tube cutters position tubing to four angles (30, 45, 60, and 90 degrees), making a wide variety of joints possible. The thumb lever ensures a good grip on the material being cut and offers excellent balance. Set the adjustable slide/stop with the lock-screw to make repeatable cut lengths easy. The brass lock-screw won't mar the steel stop and unbalance the precision machining and close tolerances of the piece. Deep V-grooves hold the material firmly in place. The head (3/4 x 3/4" x 1-3/4") is made of precision machined 45 HRC polished steel; 4-1/4" wood handle is removable, allowing the head to be mounted in a vise.