I have the same timing light and a Craftsman dwell, tach, etc meter.New points and condenser, set timing, adjust carb. Talk about fucking old school, I bought that snap on multi meter when I was in high school around '77. Same with the chrome Sears timing light. I still prefer that cheepo one on the right it is all in one unit,Tach,Dwell,and a timing light. Had it since '76.LOL,Damn I'm getting old.