Ronstan Series 40 All Purpose Block - Triple - Swivel Head

The Ronstan Series 40 All Purpose Block – Triple – Swivel Head (RF41300) is a professional-grade rigging block engineered for demanding mechanical and automotive applications where load management, durability, and low maintenance are non-negotiable. This triple-sheave configuration is designed for users who need reliable mechanical advantage in recovery operations, vehicle hoisting, load stabilization, and complex rigging scenarios. Whether you're running a shop, managing fleet maintenance, or handling field recovery work, this block delivers the performance characteristics required for heavy-duty applications.

Built with self-lubricating sheaves, the Ronstan Series 40 block eliminates the friction points that cause premature wear and line fouling in standard rigging systems. The slotted pin shackle design prevents rope or cable entanglement, a critical safety feature when working with dynamic loads or repeated cycle operations. The swivel head configuration allows natural load rotation without twisting rope, reducing stress concentration and extending service life dramatically. Ronstan's engineering ensures exceptionally high working loads while maintaining a compact footprint—at just 3 x 2 x 5 inches and 0.4 pounds, portability doesn't compromise structural integrity or load capacity.

Mechanics, recovery specialists, and fleet operators benefit most from this block's two-way head post design, which accommodates multiple attachment orientations without requiring additional hardware. The low-maintenance, self-lubricating design means less downtime for cleaning or servicing—critical when managing time-sensitive recovery or repair operations. Installation is straightforward on most rigging systems, winches, and anchor points; the triple-sheave arrangement provides balanced mechanical advantage suitable for both powered and manual applications, making it equally valuable whether mounted on a wrecker truck, shop hoist system, or field recovery rig.