A tool for a hydraulic hammer of a work machine is disclosed herein. The tool comprises a spline section and a tool section. The spline section includes a first spline sector including at least six spline grooves and a second spline sector including at least six spline grooves. The first spline sector and second spline sector are separated by a spacer. The tool section diameter is 3.2-4.8 times larger than the spline groove diameter and the tool section diameter is smaller than a spline section diameter.