Box wrench 5.5mm: 3mm Used for tightening nuts, etc. Box wrench 7mm: Used for tightening 4mm flange locknuts for wheels. Hex wrench 1.5mm: 3 × 3mm Used for tightening set screws. Hex wrench 2mm: 3mm Used for tightening hexagon screws and 2.6mm cap screws for Tamtech gear.
eBay