X-Flow HCS - X-Flow (Cross-Flow) is a dual-axis hydraulic brake lever for off-road mountain biking. The lever was initially designed to cater to amputees and those with upper-limb disabilities, a surprising number of which participate in adventure sports.
X-Flow allows both independent and simultaneous control of both brakes from one ambidextrous lever attachment. I am currently working on a Disc compatible version and on which looks a little more appealing!