VEVOR 30 T Snatch Block for Winch Recovery, 66,000 lbs Break Strength Pulley System with 0.4" - 0.55" Rope, Heavy Duty Offroad Recovery Accessory for Towing & Recovery on Truck, Tractor, ATV & UTV

Yes, this snatch block works well with both 7/16" and 1/2" steel cables, as it fits ropes from 0.4" to 0.55" in diameter.

Yes,this works with steel 3/8 cable on a rollback.

This grab pulley is suitable for line diameters of 10-14mm.

While the product description doesn't mention specifics about the corrosion-resistant coating's durability, customers generally have positive things to say about the product's overall durability. One review mentions that the snatch block is very durable and well-made.

The product description states it is compatible with ropes ranging from 10-14 mm. While it doesn't specify synthetic winch ropes, ropes within this diameter range should work.