The Dynaplex hook is a premium-quality rotary hook for heavy-duty drilling requirements. Special features: hydraulic snubber, flexible pin connection and hook positioner. The hook positioner provides faster, safer operation and cuts down round-trip time. When going in the hole, the positioner automatically rotates the elevator into the correct position for the derrickman to catch the next stand of pipe. The positioner also prevents the hook and elevator from being rotated by the “spin-up” of drill pipe going in the hole. Operators may desire to directconnect the Dynaplex hook to the traveling block.