Piece is good, but I highly recommend using a socket, small extension and ratchet unlike the directions show with a box wrench. As with any flat screwdriver, this thing will slip right off and scratch something - like your chrome cam cover. It really needs a collar around it to keep the tool on the cap. Also, unless you keep this thing centerd on the cap, it will burr the slot on the cap itself as well if it's screwed on tight. Again, a ratchet with your second hand keeping downward pressure and centered will save you a lot of headache.