Wedges and Feathers 1)advanced equipment, technology 2)excellent quality 3)good Service 4) competitive price Wedges and Feathers Parts and accessories-Wedges and FeathersIt is used to split the hard rock. The hole diameter for 32-42mm SpecificationDiameter:16mm,20mm,32mm,38mmSize:610*410mm Any questions, please feel free to let us know.