Review on CTA Tools 3235 Ramp Type Gap Adjuster by James Vilchez

It measures gap but cannot be used to actually set gap, at least not on laser iridium spark plugs. The instructions state that you must not pry open the contacts between the two contacts, otherwise the connector will be damaged. I suggest paying a little more and buying one that has a small built in knurling tool to bend the pin to set the gap. I ended up using needle nose pliers to adjust the gap.