Previously I was using nuts and bolts to hold my lights to the T-bars, but these half couplers make setting up and packing away much quicker.
The build quality is very good, and they feel very strong and weighty. The swivelling bolt for the pole clamp means that you don't have to remove the nut - only loosen it. The bolt protruding from the bottom is easily replaceable should it become worn out.
The black finish is perfect for use in theatres and DJs, as it doesn't reflect the light like an unfinished or silver coupler. It blends in to the T-bar to give a professional finish.
I am impressed by this product and will definitely be ordering more when I get more things to attach them to!