Tools are part of the technician. Its an experiential item. It is what makes them a technician besides knowledge. I carry my drill, two sets of pliers, needle nose, 11n1, wire strippers, and putty knife to 95% of my work orders. If you are efficient and work to master your craft, you really dont need a lot of tools eliminating the argument of why the maintenance technician should buy their own tools. I know we need more than tools than those mentioned, but you shouldn't be buying 100s of dollars of tools if you really know what you are doing.