The Makita 9557NB is a compact yet powerful 4½‑inch (115 mm) electric angle grinder designed for a wide range of cutting, grinding and finishing tasks. With its 840 W (7.5 A) motor, the unit spins discs at up to 11,000 rpm, offering strong performance for metalwork, stone cuts, masonry, and general fabrication. 

Built for longevity, this grinder features a robust labyrinth construction to keep dust out of motor bearings, plus zig‑zag varnish and thicker coil wires to reduce heat build‑up and extend tool life. The narrow barrel grip (≈ 2½″) and a lightweight body (~ 2.0 kg / ~ 4.4 lbs) make it easier to handle during prolonged use or working in tight spaces. 

It includes a sliding AC/DC switch, spindle lock for quick disc changes, side handle positionable either side for flexibility, and comes with guard, lock nut, inner flange, wrench—everything needed to get started.