Check the listing for details. Leofoto GC-282AL Geared Multi-Function 2 Section Center Column. Condition: New. Listed at 116.10 USD. The Leofoto GC-282AL Geared Multi-Function Boom Arm is an aluminum, gear-driven extension arm that adds lateral extension to virtually any tripod leg set. The base mounts to the top of any tripod with a 3/8"-16 threaded mounting studPrecise Movement and Positioning Aluminum column has a gear-driven extension driveEach turn of the crank handle delivers 14mm of movementPrecision adjustment possibleTwist-lock joint to hold the extended arm in placeFolding crank handlePan and Tilt Control with Large Rubber Grip Pan handle features large ergonomic rubber gripTextured surface for maximum tractionTwist handle to lock and unlock pan and tilt actionPan and tilt action released simultaneouslyConvertible Pan Tilt Arm / Center Column Tilting base with 3/8"-16 mounting threadRemovable ballast hook with 3/8"-16 mounting screw16-25" lateral or vertical column extension6.6 lb load capacity180° Tilt and 360° Panning Range Precision numbered tilt scaleUseful for macro imagingPrecise control of lateral extensionColumn extension locking leverAnti-Twist Head Flange and Reversible Head Mounting Screw Large 50mm head platform2 locking Allen screws prevents head platform movement1 locking Allen screw prevents tripod head movementReversible 3/8"-16 to 1/4"-20 tripod head screwCompatible with virtually any tripod headLeofoto GC-282AL Geared Multi-Function Boom Arm:Length: 410mm-640mm (16"-25")Tube Diameter: 28mm (1.41")Weight: 740g (26oz). Max Load: 3kg (6.6lb)