The Jonnesway short metric hex key set (9 pieces), universally known as Allen keys, is the industry standard for tightening heavy-duty internal fasteners. Their short-arm design is strategic: it reduces the necessary turning radius, allowing high torque to be applied in confined spaces where a long key would interfere, while minimizing tool flex for more direct and controlled force transmission.
Made from heat-treated Chrome Vanadium (Cr-V) steel to prevent torsional deformation, these keys guarantee a long service life even under intensive use. The set covers the essential metric range from 1.5 mm to 10 mm and comes organized in a compact plastic case with clear size markings, making it an indispensable tool for bicycle maintenance, industrial machinery, and furniture assembly.
