Clarks V-Brake Kit – Full Front & Rear Set (CLK-370-960). Compatible with most MTB and hybrid bicycles. This set includes front and rear brake calipers, levers, inner/outer cables, and all required fittings for easy installation.
The price should have given it away but this is a terrible set of brakes.
The threads on the adjusters are very poorly cut, the barrel nut is very loose in the housing but still catches and locks up as you adjust the cable tension.
Assemble and adjust everything as normal and the lever comes to the bar, seems it's a combination of cable stretch and the pads compressing under load which is pretty abnormal.
So I went out and bought new pads and cables as I don't trust these Wish quality parts on my father's bike.
Should have spent more and bought a decent set.