This precision work support can be locked and unlocked with one-touch operation and keeps stable support capacity. The support helps keep accuracy of the workpiece height and can be used by remote control. Turn the knob 45 degrees left or right to reach unlocking or locking position. Body made from anodized 5052A aluminum. Piston made from SK95 steel, quenched and tempered, with a black oxide finish. Knob made from 303 stainless steel.