The 40mm block from Harken comes in two formats, the carbo and then the ratchet carbo. The ratchet version of the 40mm Harken block come either with on/off switches or as an automatic ratchet.
Harken 40mm blocks are lightweight, strong and reliable with a fiber-reinforced composite construction meaning they have a great strength to weight ratio.
You can expect breaking loads of up to 1,383kgs.
Explore other Harken block and pulley sizes on our Harken blocks page.