lever arm - heavy duty https://www.efihardware.com/products/56/lever-arm-heavy-duty
10mm wide for extra load carrying and clamping force to shaft. Holes are tapped to M5. (M5 threaded holes also suits 10/32UNF)
Shaft Center To M5 Threaded Lever Holes: 34.5, 44.5 & 54.5mm
Overall Length: 73.5mm
Overall Width: 10mm
Suits 8mm & 5/16" shaft diameter.
Available in Blue, Black and Natural Anodizing.