With oversized anodized aluminum tubing, solid stainless steel slide rails, and delrin bearing rods the hand built Commander system makes a statement of class aboard any large boat or yacht. 360 degree free rotation or positive lock in 45 degree increments - single lever operation with drag adjustment for optimal performance. 6" of fore and aft travel with positive locking at 1" increments. Solid 1" stainless steel slide rails with lubrication system are operated with a single lever for effortless and smooth precision operation. The 12" diameter base provides a solid, wobble free mount. Provides 112 lbs. of lift force.