My jigsaw often sits for months ... Most jigsaws accept blades with a 1/4-inch universal tang that locks into the blade clamp with a set screw. Some saws accept only specially designed blades ...

Chisels in a wide range of sizes like this set from Irwin/Marples ... the best tool for the job is a jigsaw. Blades available for wood, metal and plastic are inexpensive and easy to replace.