There was a point when many people would have called it a Lobophytum, but a fairly recent study has shown that its bloody near impossible to differentiate between Lobophytum and Sarcophyton- despite the 'classic' shape differences. Basically- a proper name isnt gonna happen.
Luckily, Devils Hand is a pretty widely used trade name, and most of the time, people will know youre referring to a coral that is the same/similar to what youve got there.
Yours looks larger than most of the ones Ive seen for sale lately, and in good shape. Give it a fairly strong current and moderate light, and it should do well for you.