The Stanley FatMax series of pressure washers is positioned as a semi-professional solution — more powerful and reliable than typical household washers, but more affordable than specialized professional equipment. It is aimed at demanding home users, small businesses, construction contractor crews, and service departments that need a reliable washer for regular intensive use without overpaying for a professional brand.

The structural basis of the entire electric lineup is an axial piston pump with hardened stainless steel pistons and an aluminum body. The hardened pistons are significantly more resistant to wear and corrosion than steel ones in household-class pumps, providing stable pressure throughout their service life. The pump is equipped with an automatic safety valve with low-pressure bypass: when the trigger is released, pressure is relieved inside the pump, not remaining in the hose — which extends the lifespan of the entire hydraulic system. The Auto-Stop system shuts off the motor when the trigger is released, reducing wear and energy consumption. All models accept water temperatures up to 50 °C, allowing work with preheated water for better removal of greasy dirt. Quick-release connections of hoses, lances, and accessories are standardized between the models in the series.

Standard electric models are based on a four-wheel base with a metal telescopic handle and a static hose reel with a lock. Rotary and adjustable nozzles included cover most household tasks: washing cars, patios, facades, and garden equipment. Flagship models focus not on pressure, but on water flow, providing high-speed cleaning over large areas. On average, power ranges from 2100 to 3000 W, pressure — 150 to 160 bar.

Additionally, the range includes compact handheld models that operate wirelessly powered by a battery. A single charge usually lasts up to 25 minutes of use. Considering the format, the specifications of such devices are much more modest: pressure of 24 bar, water consumption of 120 l/h. The device can draw water both from the water supply and any container. The kit most often includes a foldable bucket of 20 L, a suction hose, a universal nozzle, a foam generator, and a brush.