Benro COM37AL Combination AL Series 3 Long Tripod, 3 Section, Flip Lock. (Black) Forgoing a conventional center column, the Combination COM37AL's flat mounting plate spider is compatible with Benro's entire line of Benro Accessories. Swapping between accessories requires no tools, so making changes in the field is simple. After removing the Combination COM37AL's flat mounting plate, a wide range of accessories can be fitted in into it's place. These accessories include a 75mm & 100mm video bowl, leveling base and a geared column. The Combination COM37AL's flat plate spider's safety lock ensures your's gear stays safe. Where ever possible the Combination COM37AL employs magnesium castings making it among some of the lightest tripods on the market. Swap in the included oversized rubber feet for added traction while ensuring you don't scratch or mare the surface you are shooting on.