Heavy Duty made out of 6mm mild steel as you can see by the pictures these are the proper ones which are extra long to make easy work of undoing the viscous fan, also less chance of taking the skin off your knuckles!
Also have a 13mm square hole on the opposite end for undoing some of the oil level points, on some landrovers or this could be used to hang the item in your garage. 
These are electroplated, you are buying the pair as pictured.