Using a chisel for cutting door hinge slots

Door Installation Skill Learning: How to cut perfect door hinge slot

In reading David Freedman's article on mounting slot hinges, I notice that he suggests using a slot cutting saw blade mounted in a 12″

ventral slot surgery dog Go straight down until the blade is as deep as the hinge is Then go to the other side where the hinge will go and again insert the blade

slot kings CA EDGE HINGE Slot cutting jig FOR BALSA – by Pat Tritle $