Whites Engine/Swing Arm Lock Nut ToolThe Whites Engine Swing arm lock nut tool is designed to remove lock nuts on motorcycle engines and swingarms. Constructed from heat treated carbon steel and chrome plated the tool is extremely strong and corrosion resistant, ensuring a long life. Designed with a 30mm outside diameter and a 24. 5mm internal diameter and four 4mm x 5mm lugs for exceptional contact with the lock nut. The tool has a 19mm external hex head and a 1 2" square socket drive