9-13/16 IN (249 mm) minimum radius. Strong welded steel yokes. Forged steel closure type hook with 1 IN (25.4 mm) opening. 5 IN (127 mm) wide aluminum alloy sheave with self-lubricating bearings. Yokes rotate independently to fit various setups. Use with any cable puller whose maximum pulling force is4,000 lbs.(17.8 kN) or less.