Matthews C Clamps are available in 4″, 6″, 8″, 10″ and 12″ with or without 5/8″ mounting pins or Junior Receivers. Each clamp has a steel channel welded to both sides of the opening for better and safer locking. Clamps made for mounting Baby fixtures have two separate pins at different angles so that the light fixtures may fit with minimal clearance. Junior Receivers are made in two fixed versions. Horizontal and Vertical and a Universal Mounting Junior Receiver which can be used in any one of eight different positions.
Matthews C Clamps are manufactured from premium drop forged steel. It should be noted however, that since the Matthews clamp is an adaptation of a standard C Clamp, there is no effective warranty on the part.
$235.80
Works on diameters from 10mm to 55mm. It has a 5/8″ mounting stud and a load capacity of 220.46 lb (100 kg). Made of aluminum.
The Avenger C4482 Swivel MP Eye Coupler is made from 2 connected couplers that are free to rotate 360°. Designed for quick and easy connecting of trusses, bars or pipes. This swivel coupler is capable of clamping diameters ranging from 42 mm(1.65”) to 52 mm(2.04”) and each coupler is 50 mm(1.96”) wide.
Recommended Accessories: E390, C155, C460-1, C461-1, C463-1, C4460-1, C464-1, E200, C4465-1, C464-1.
Avenger C461-1 Eye Coupler LP 28mm TV Spigot Range 48-52mm 220kg Payload Alum Alloy Spigot 28mm.
Manfrotto 143 Arm Magic Kit 143N + 143BKT + 035B + 003SPL 
Avenger C4460-1 Clamp MP Eye Coupler TUV 300Kg 42-52mm Wide 12 5mm Unthreaded Hole 
