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Research ArticleOpen accessIn the keywordsUsability Validation of an Ergonomic Inward Directional Screwdriver for Enhanced Musculoskeletal ComfortPoh Kiat Ng, Bing Sheng Choong, Kian Siong JeePrevious studies suggested that the use of inward torque direction in hand-related manual activities not only increases the total normal force and torque capacity but also reduces grip force. This means lesser effort is required to perform the task, which prevents overexertion and hand injuries. Manual screwdrivers are the most common hand tools used in the industry and daily life. … …American Journal of Applied Sciences, Vol. 13, Issue 11 · 27 Oct 2016 · 7,446 accessesView PDFCite