Heller trijet sds plus hammer bits heller 26781 6 this 16 x 450 x 400mm trijet sds plus hammer bit from heller is part of a new generation of hammer bits designed to give powerful fast and consistently high performance made from extremely wear resistant tungsten carbide alloy for a long service life supplied singly heller 26781 6 2618 trijet sds plus hammer bit 16 x 450 x 400mm single