How tools actually work, and how to choose one
An angle grinder disc is rated for a maximum safe operating speed, printed on the disc itself along with its diameter and bore size. That speed rating exists because a spinning disc stores real energy, and a disc pushed faster than it was built for can shatter, sending fragments outward at high velocity. What does … Read more
A bench grinder is a stationary motor with an abrasive wheel (or two) mounted on each end of its shaft, used to sharpen edge tools, shape and deburr metal, remove rust or old finish, and clean up welds. It sits on a bench or stand and the workpiece is brought to the spinning wheel, not … Read more
An oscillating multi-tool is best at short, precise cuts in tight spaces where a full-size saw or grinder can’t reach or can’t be controlled safely — flush trims against a wall, plunge cuts into a panel, scraping old adhesive, or sanding a corner. It swaps blades and heads fast but isn’t built for long, heavy-duty … Read more
A rotary tool is a small handheld motor that spins a narrow shaft at high speed, holding interchangeable bits in a collet or chuck. It is genuinely good at detail work — engraving, fine grinding, deburring, small cuts and polishing — and genuinely bad at removing large amounts of material fast. It is a precision … Read more
An SDS chuck is a spring-loaded, keyless bit holder that grips a bit by its grooved shank instead of clamping it tight like a normal drill chuck. It lets the bit slide back and forth a few millimetres inside the chuck while still turning with it, which is exactly what a rotary hammer’s internal piston … Read more
A wire brush is a hand tool: you hold it, push it, and control every stroke yourself. A rotary wire wheel is the same idea driven by a motor — fitted to a bench grinder, angle grinder or drill — spinning the wires at speed instead of moving them by hand. The difference is control, … Read more
An impact wrench is a high-torque tool built to loosen and tighten bolts and nuts using a square drive and sockets, mainly on vehicles and heavy fixings. An impact driver is a lighter, hex-drive tool aimed at driving screws and small bolts in wood, metal and general assembly work. Both use hammering internal mechanisms, but … Read more
A jigsaw goes to the workpiece and cuts freehand curves in sheet material and boards of moderate thickness, with the blade able to exit and re-enter anywhere. A bandsaw is fixed, feeds the work to a continuous blade, and holds a tighter, cleaner curve through much thicker stock — but the workpiece has to reach … Read more
The trade-off is speed and finish for reach and flexibility. A dedicated tool — a jigsaw, a detail sander, a flush-cut saw — does one job faster, cleaner, and with more control. An oscillating multi-tool does dozens of jobs adequately, in places a dedicated tool can’t fit, using accessories rather than a whole new machine. … Read more
A sheet sander moves its pad in tight small circles or a straight back-and-forth pattern and takes quarter- or third-sheets of standard sandpaper, while a random orbital sander spins a round pad in an oscillating, randomised path that swirls in every direction. The random orbital leaves a less directional scratch pattern and is the better … Read more
About what you read here. Everything on Find Tool is general information and our own editorial opinion. We research carefully and we say when the evidence is unclear, but we can be wrong, things change, and no article can know your particular situation. Please do your own research and make your own judgement rather than treating anything here as the final word. Prices, products and specifications around tools and workshop equipment change constantly, and what suits one person will not suit another. Check current details yourself, and where a decision involves real money, safety or something you cannot undo, it is worth confirming with the manufacturer, or a qualified electrician or tradesperson before you act.