MultiTrimmerBasis: Transforms a string trimmer into a mower with an even cut for small lawns and uneven terrain. Lightweight, compact, and mobile for easy maneuverability, comfortable transport, and compact storage. Tool-free conversion: Simply snap the string trimmer into the mower chassis and easily release it using the foot pedal. 2 cutting heights: Easily adjustable axially to 40 or 60 mm cutting height. Compatible with the following Black & Decker string trimmers: ST5530, ST4525, GL5028, GL5530, STC1820, STC1815. Technical specifications: Possible cutting widths: 25 / 28 / 30 cm. Height adjustment: 2-stage, axial front/rear. Cutting heights: 40 / 60 mm. Compatible with: ST5530, ST4525, GL5530, GL5028, STC1815, STC1820.