Hand Tools — What You Need and Why

Your tools are your livelihood. A professional technician's tool set is an investment that can cost thousands of dollars over a career. Start with quality basics and build from there. Cheap tools break, strip fasteners, and cost you time. Good tools last decades.

Combination wrenches have an open end on one side and a box end on the other. The box end grips all six flats of the fastener and is stronger — use it whenever possible. The open end is for situations where you cannot get a box end over the fastener. You need both metric and standard SAE sets. Most modern vehicles are metric. Older American vehicles and some truck components are standard. A 10mm wrench is the most-used and most-lost tool in every shop.

Sockets fit over fasteners and are driven by a ratchet handle. The ratchet allows you to turn the fastener without removing the socket and repositioning after each turn. Socket sets come in quarter-inch, three-eighths-inch, and half-inch drive sizes. Three-eighths is the most versatile and handles most automotive fasteners. Half-inch drive is for larger fasteners and higher torque applications. Six-point sockets grip the fastener better than twelve-point and are less likely to round off a tight bolt. Use six-point whenever possible.

Phillips head and flat blade in multiple sizes. The correct size screwdriver fills the screw head completely. A screwdriver that is too small strips the screw head. Too large and it does not seat properly. Torx fasteners — star-shaped — are common on modern vehicles especially for interior trim, brake calipers, and engine components. You need a set of Torx bits from T10 through T55 minimum.

Needle-nose pliers for reaching into tight areas and holding small parts. Slip-joint pliers for general gripping. Locking pliers — Vise-Grips — for clamping and holding with adjustable tension. Snap ring pliers — both internal and external — for removing and installing snap rings that hold bearings, shafts, and components in place. Hose clamp pliers for spring-type hose clamps.

Pry bars for leveraging components apart. Picks and hooks for removing seals and O-rings. Breaker bars for breaking loose extremely tight fasteners where a ratchet would break. Extensions of various lengths to reach fasteners deep in the engine compartment. Universal joints — wobble sockets — for reaching fasteners at angles. Build your collection as you encounter the need. Every tool you buy should solve a specific problem you have faced.