The keys are curved to fit the tips of your fingers, they click when you press them, and you can feel the click.

ENGADGET: Matias updates the Tactile Pro to version 4, announces Mini Tactile Pro keyboard, we go hands-on (video)

Ten years ago, he famously used a fretsaw to cut off the tips of his fingers on the same hand after they'd been damaged by frostbite.

BBC: Sir Ranulph Fiennes: Diabetes link to Antarctica injury

As a youngster Winstone had been something of a brawler in the ring, but as a teenager he lost the tips of three fingers on his right hand in an accident whilst working in a toy factory.

BBC: 5. Howard Winstone

Sifakis stretched and grazed the ball with the tips of his left fingers but had little chance at the save.

WSJ: Euro 2012: Germany Kicks Greece Out of Euro (Soccer Tournament)