This is a pair of used/second hand, chromed headlight brackets made by John Tickle in the 1960s. The fasten with one screw on the clamp. The clamp fits Norton Roadholder and Commando fork legs - 34mm (1 3/8 inches). The chrome is very good but not perfect. I have tried to photograph them so you can see the flaws in the chrome. They have John Tickle (RE) and RD 919576 and 919575 stamped/cast into them.