Matthews B429754 is designed for use with light weight fluorescent or other fixtures weighing no more than 25 lbs.(11.4kg.) Engineered to telescope from the grid with nominal ceiling clearance. Telescoping Hangers are available in a wide range of lengths and attachment options for both temporary and permanent placement of lighting fixtures. Constructed of aluminum with internally welded safety collars and cast aluminum fittings. Hanger will accept all pipe clamps currently being manufactured. Size and weight are less than 50% of conventional hangers. Hangers come standard with Bolt Mount.