Robust blocks, made from first-class ash wood as single, double or triple blocks. These blocks have been produced more or less unaltered for working ships and gaffers since 1870.
The housings are copper-riveted, and the fittings have a solid and long lasting galvanization.
The standard blocks come varnished or unfinished, so they can finished to match the color scheme of the boat.
The sheaves are made from high-strength reinforced nylon and run on stainless steel axis bolts, that in size 4"-7" have a patented safguard against unscrewing.
These blocks conform to standards set by Lloyds Register of Shipping and Bureau Veritas.
The working load limit (WLL) is faktor 5 of the given breaking load (BRL)