Sailing dinghy single block with swivelling hook (max. line ø : 5 mm)
391
Harken
The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) safe working load--the highest on the market compared to similarly sized blocks.
The 442 uses a spacer and the 404 uses an O-ring to keep the line in the sheave during intermittent loading.
The 467 uses a narrow sheave for extremely small control lines and has a ferrule head for soft attachments.
