Hand tools — Workplace Safety & Tools

Identify the common hand tools of the trades and use them safely.

Why it matters

Hand tools seem harmless, which is why they cause so many cuts, crushed fingers and eye injuries. Most of those injuries come from three causes: the wrong tool for the job, a damaged tool, or a tool used the wrong way. On your first day, a journeyman will ask for a tool by name; knowing them helps you work faster and safer.

Tools you will meet

Screwdrivers and drivers

Slotted (flat), Phillips, Torx (star), square (Robertson) and hex tips. Match the tip size so it fills the screw head; a loose fit strips the screw and slips.
Insulated screwdrivers are rated to 1,000 V and marked with a double triangle. They add protection but never replace de-energising and testing.
A screwdriver is not a pry bar or chisel.

Pliers

Lineman's (side-cutting) pliers: electricians' all-rounder for gripping, twisting and cutting wire.
Needle-nose (long-nose): reach into tight spots, bend loops in wire.
Diagonal cutters (dikes): flush cuts on wire and cable ties.
Tongue-and-groove (slip-joint, "channel locks"): adjustable jaws for pipes and nuts.
Locking pliers: clamp and hold.

Wrenches and sockets

Combination wrench: open end on one side, box end on the other. The box end grips all six sides of a nut and slips less.
Adjustable wrench: set the jaws snug, and turn so the force goes toward the fixed jaw. A loose adjustable rounds off nuts.
Socket set and ratchet: fast and secure; use a torque wrench when a specification gives a tightening value (for example 25 N·m).
Hex keys (Allen keys): for socket-head screws; metric and inch sizes are not interchangeable.

Always pull a wrench toward you rather than push, so your knuckles do not hit something if it slips. Never extend a wrench with a pipe ("cheater bar").

Striking and cutting tools

Claw hammer for nails; ball-peen hammer for metal work and punches. Never strike two hardened tools together.
Chisels and punches: grind off a mushroomed head, because chips can fly off it.
Utility knife: cut away from your body and your other hand, use a fresh blade (dull blades need more force and slip), retract the blade when you put it down.
Hacksaw: teeth point forward, away from the handle; it cuts on the push stroke.
Files: always with a handle fitted.

Layout and checking tools

Tape measure (lesson 9), level (bubble centred between the lines), combination square, speed square, chalk line, and a non-contact voltage tester, which an electrician uses only as a first warning, never as proof that a circuit is dead.

Safe use, in five rules

Right tool, right size. If you are improvising, stop and get the right one.
Inspect before use. Look for cracked or loose handles, mushroomed heads, worn jaws, damaged insulation. Tag out damaged tools.
Protect yourself. Safety glasses are standard for striking, cutting and prying. Keep your other hand out of the line of the blade or the slip.
Control the tool. Stable stance, workpiece clamped in a vise, no working above your head without a plan.
Carry and store safely. Sharp edges down or covered, no screwdrivers in back pockets, tools off ladders and walkways.

Worked example: removing a stubborn nut

A 13 mm nut on a pump bracket will not budge.

Wrong: an adjustable wrench, pushed, with a pipe on the handle.
Right: a 13 mm six-point socket on a ratchet, wrist straight, pulling toward you; apply penetrating oil and wait if it is seized. If it still will not move, ask: is it a left-hand thread? Is there a specification? Do not escalate force until you know.

Common mistakes

Using pliers on a nut (rounds the corners).
Using the wrong screwdriver tip and stripping the screw.
Cutting toward your hand or leg with a utility knife.
Trusting an insulated tool on a live circuit.
Leaving tools on the top of a ladder.

Recap

Know the families: drivers, pliers, wrenches and sockets, striking and cutting, layout tools.
Match the tool and size, inspect it, wear eye protection, pull don't push, cut away from yourself.

Try it

In the Do tab, inventory a home toolkit, inspect each tool and practise driving screws into scrap wood.