Heller trijet sds plus hammer bits heller 26780 9 this 16 x 300 x 250mm 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 26780 9 2618 trijet sds plus hammer bit 16 x 300 x 250mm single