JUSTYINUO 12 Pieces 1/2 Size Knurled Socket Hex Nut Driver Bit Socket Wrench Set Hand Tool Combination High Hardness Metal Driver Bit Set socket wrench set : Amazon.co.uk: DIY & Tools
3.5mm knurled nut driver - good for mobile modulars &DIY - MOD WIGGLER
3.5mm Knurled Nut Driver Tool | Reverb
NUT DRIVER M3 nut, standard
Idex Extender Tool to Torque Driver for 1/4" Hex Nuts; 1/EA from Cole-Parmer United Kingdom