The SitePro Heavy-Duty Column Clamp provides a stable platform that works with all 5/8 x 11 instruments. The adjustable column rotates and moves vertically to position the height of your instrument. Adjustable column height of 12" (30.48cm) 6" flat platform with 5/8-11 thread stud to mount instrument Rubber bumper for hand and fingers protection Includes a 2" (5.08cm) by 10' (3.05m) strap with load rating of 2,200 lb (1,000kg) Centerline of the /8-11 stud to column measures 15" (38.1cm) Constructed of structural aluminum for industrial applications and stainless steel hardware Weight - 13.8 lb (6.25kg)