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Diplomsko delo opisuje postopek snovanja koncepta orodja za enoročno obrezovanje travnatih robov. Orodje po obliki spominja na invalidsko berglo, temelji pa na tehnologiji akumulatorske kosilnice na nitko. Razvoj orodja je začrtan s tržno in ergonomsko raziskavo. Zunanjo obliko orodja določajo tehnične rešitve sistema - postavitev elektromotorja in akumulatorja ter izvedba prenosa vrtilnega momenta. Oblika ročaja je dobljena s postopkom vzvratnega inženiringa. Rezultati so prikazani v obliki virtualnih foto-realističnih slik in v obliki enostavnega fizičnega modela v realni velikosti. Ročaj je izdelan s postopkom hitre izdelave prototipov. Diploma work focuses on development process of a tool for one-handed lawn edge trimming. The tool form reminds of a crutch and it is based on an accumulator string trimmer. Development process starts with market and ergonomics research. The looks of a tool is mainly defined by inner technical solutions like placement of an electromotor, accumulator and a solution for torque transfer. The form of a hand grip is developed by reverse engineering process. Results are presented with computer generated, photo-realistic renders and with a simplified, full-sized physical model. A hand grip is created using rapid prototyping technology.