I've got a Haxorus with dragon claw and dual chop and I need to make room for another move.

What I'm asking is whether dual chop gets STAB for both hits, because I think STAB gives you x1.5 more power of a move, giving dragon claw a base power of 120, but will dual chop get a STAB bonus for both hits ( 2(40 x 1.5)) making 120 as well ?