For use with the RockPro G-10 and G-15 Series Pneumatic Splitters. These Feather and Wedge Splitter sets fit into a range of different drill holes, after they are placed in the hole a Pneumatic Splitter is placed on top. The Splitter uses Air Compression to hammer down on the feather and wedge and splits the rock in accordance to your selected drill pattern. Quick and reliable results for splitting small to medium sized boulders and concrete.