Spinlock's asymmetric extension improves helming performance by providing more feedback for accurate and precise control, and increasing mobility so the helmsman can maintain the optimum position for control, visibility and reduced pain and fatigue. The asymmetric grip fits the hand better and supports the wrist. Helming with two hands allows the arms to relax in a more comfortable, elbows-down position.
The extensions can be quickly released from the tiller for stowage. The Diablo universal is preferred by single-handed yachtsmen because the windsurfing-style universal joint returns the extension to the vertical position when released, making it easy to find. The SPEA900SG has a foam grip on the tube.
Diablo extensions require a 3 to 4 week special order.