Open ended locking wheel nuts with a 60 degree taper. Supplied in sets of 4 with locking key.
21mm in length, and for use with a 19mm socket. Please note that the key socket has a closed end, which can hit the end of the stud if you're running long studs. A solution to this is to run shorter studs, or by drilling a hole in the end of the key to allow the stud to pass through.
Supplied only in M12 x 1.5