There are three kinds of wrenches (I won't say "Technicians") that you find working at burger joints.
Sidebar: "Burger joints" or "burger racks" are what we in the 'industry' refer to quicklube-type places as. The reason is because the people that work there have about the same level of mechanical knowledge and ability as someone flipping burgers for minimum wage.
Anyways, three types.
The first type is the old guy, who's either been working there for-fucking-ever and has given up on life, or who worked at legitimate shops/dealerships for a while and just couldn't hack it, so now they work at a burger rack since they didn't plan ahead for their future and don't have anything to retire with. These guys will typically have HUGE toolboxes PACKED full of bajillions of tools, however most of them are obsolete or useless (and most of their wrenches and sockets are SAE).
The second type is the young up-and-comer (don't get excited, this isn't you), who is either in tech school, fresh out of tech school, or considering going to tech school in the near future but hasn't made up his mind yet. These guys usually don't have very many tools, and often times will work out of a portable toolbox or tool chest. Not a lot of know-how yet, but they're just trying to get their feet in the door at SOMEWHERE automotive related so that they can use it for job experience down the line. These guys typically don't stay flipping burgers for too long, unless they're destined to be a 'lifer.'
And then there's the third type, which is you. These guys don't know shit about fuck, and usually have a mismatched set of tools stuffed into an off-brand (and yes, Craftsman is 'off brand') hand-me-down toolbox. They'll have the most random shit stuffed in their toolboxes, like broken or incomplete specialty tools, wrench and socket sets that they've got from friends who were throwing away extra tools, five-foot-long prybars that they bought because 'look how fuckin big it is', and TONS of flathead screwdrivers. A lot of the time these jackwagons' tool boxes will contain at LEAST one clawhammer. These are the guys that don't set torque wrenches back to zero when they're done using them (if they even use them), borrow tools from everyone else, brag to their friends about being a 'team leader' or 'lead technician' or 'shop foreman' when in fact they're nothing more than an apprentice or helper, show up late and leave early, smoke cigarettes while they're working on things, leave drain plugs loose, round off wheel studs, crossthread lug nuts, put brake pads on backwards, and generally destroy everything they touch. When they crossthread/round off/break a bolt, they're the first ones to go running to their superior to say "Look! This broke, it came in like this!" and they're also the ones who refuse to take responsibility when they fuck something up. This type of burger flipper almost ALWAYS drives a clapped-out car that they think is a 'race car', and 90% of the time their car will have tons of random stickers that don't relate to them or their vehicle at all, open header/straight pipe/loud raspy mufflers, cloudy shittily-smoked taillights, wings, eBay brand racing seats, and huge AutoMeter tachometers from 2001 (which, where the fuck are they finding these?)...and almost ALWAYS the car will be on mismatched wheels or steelies. These guys think they're Science's gift to the automotive world, and 'their ride is just clapped out because they're saving up money to make it fast rather than to fix it up now' or it's "under construction" - which, half the time they actually have an 'under construction' sticker on the vehicle. They go into their job thinking they know all there is to know, and they refuse to absorb knowledge from others who know more than them (even in shithole burger joints, where knowledge isn't all that abundant in the first place). They make up their own diagnostic procedures and will stick by them to the bitter end, even when someone else is showing them plain as fucking day that they're wrong. They'll misdiagnose themselves upside down and every which way, drop bolts in engines, make up 'diagnostic solutions' of their own, and make an overall general fuckery of everything they come in contact with. On more than one occasion, I've seen burger flippers literally FILL UP an engine with oil and send it out the door. These guys are the worst of the worst, and the ONLY thing worse than one of THESE guys is an Old Lifer that started out as a Flatbiller Fuckwit and somehow managed to keep turning wrenches and rounding off bolts for the last 30 or so years of his worthless life.