‘SPEED’ Trolley Frame is made out of Steel Plates joined by bolts. The four flanged wheels are of graded cast Iron, with Machine Cut Gears and they are mounted either on Gun-Metal Bush or Ball Bearings, as desired. Suitable to run on lower flanges of ‘I’ Beam. All Trolleys are adjustable as per the required size of ‘I’ Beam. Each Trolley is tested to 50% over load and a manufacturer’s test certificate is issued.