These are the tools that actually get used on the floor โ vetted by working technicians, not a manufacturer's spec sheet.
(Some links below are affiliate links โ costs you nothing extra.)
๐ Multimeters
๐ฐ Best Bang for Your Buck
Fluke 117 โ Best Value True RMS Meter True RMS, low impedance to eliminate ghost voltages, auto-volt feature. Does everything most techs need on a daily basis. See on Amazon โ
Fluke 87V โ Industrial Troubleshooting Meter Built for industrial work. Low-pass filter for accurate readings on motors and VFDs, peak capture for chasing intermittent faults. CAT III 1000V rated. This is what serious industrial techs carry. See on Amazon โ
Fluke 1587 โ 2-in-1 Multimeter + Insulation Tester Versatile, compact, and built tough. A solid all-around meter for industrial work. See on Amazon โ
Fluke 789 โ Process Meter Wide measurement range, enhanced safety features, rugged design. Best in class. See on Amazon โ
Fluke 771 โ Milliamp Clamp Meter Non-intrusive 4-20mA loop measurement. Best clamp meter for controls work. See on Amazon โ
โ ๏ธ One more thing on meters:
Whatever meter you go with, make sure you pick up a set of alligator clip leads and back probe pins.

Fluke TL81A โ Deluxe Electronic Test Lead Kit Includes back probe pins, alligator clips, and fine hook probes. Everything you need to test live signals inside connectors without unplugging anything. Get this with whatever meter you buy. See on Amazon โ
The alligator clips let you clamp onto terminals and keep your hands free while testing. The back probe pins are thin enough to slide into the back of connectors without unplugging anything or damaging the connector. You'll use these constantly when testing live signals on sensors and solenoids.
Neither will break the bank and both will save you a ton of frustration on the floor.
๐ง Other Tools
Actuation Tool โ For Terminal Blocks Essential for working with push-in terminal blocks. You'll use this more than you think. See on Amazon โ
Insulated Screwdriver Set โ 13-Piece, 1000V Rated All the drivers you need, built for electrical work. See on Amazon โ
Wire Stripper โ 8" Cutter & Stripper Strips 10โ20 AWG, cuts NM-B, BX, and MC cable. See on Amazon โ
Insulated Pliers Set โ 1000V Rated, 3-Piece Needle nose, side cutters, and lineman's โ the three you actually reach for. See on Amazon โ
Ferrule Crimping Tool โ Self-Adjustable Ratchet Professional crimper for wire end terminals. Makes clean, reliable terminations. See on Amazon โ
Veto Pro Pac โ Tech Tool Pouch 20 internal pockets, hang-up hook. Keeps your tools organized and accessible. See on Amazon โ
Got a tool that deserves to be on this list?
If it's worth it, we'll add it.