Worked as needed to and a great alternative to screwdrivers and pry bars for tensioner parts that can't be seen and best moved with plastic on plastic. Do not see them lasting long in a busy shop that changes 3.6 top end parts all day but that's not their intended lifespan and for careful casual use they work very good. Even then at the cost of replacement they are worth billing for every job if surviving single use. Important to gently "rock" the cams back and forth to align the phazer gears for the locking blocks as prying or hammering will only destroy them quicker and it's not necessary.