1-1/2" sq boom to mast clamp

Clamp for holding 1-1/2" square boom to 2" round mast. Allows boom to be adjusted to point of balance. No holes are needed through the boom. Clamp comprises 3 aluminium plates, 2 M8 U bolts with saddles and four M6 bolts. Nominal size is 200 x 100mm. Can be engineered for other mast sizes - please ask.