The benchmark of cross country component design XTR® has been designed to give that expected Shimano reliability while adopting a new generation of shifting, drivetrain and braking systems. From the easy and flexible shifting performance of the Dual Control™ shift lever to the super-lightweight, linear response, & ultra-light disc brake design, XTR continues to be the benchmark of off-road cross-country component design. The 2007 Shimano XTR M970 Rapidfire Shifter Lever Set offers instant release for quicker shifts. A click of the upper lever releases the cable, same as it always has. Now it releases immediately when the lever is depressed making shifts that much quicker. Multi-release allows two-gear shifts. 2-way release for different riding styles or shifting from various riding positions. The upper lever still performs the same function but now it swings both ways. Pull it with your finger or push it with your thumb...you choose. Horizontally adjustable clamp bracket allows inboard/outboard posiitoning for different riding styles. Sealed SIS-SP41 cable casing system & coated stainless steel cable for super smooth shifting.