Backreamers from Melfred Borzall are designed to get through a wide range of soil conditions - from clay, to sand, to rock. The Crusher Reamer has aggressive saw-tooth carbide cutting blades that rip through hard, dry soils and cobblestones. Its tapered, low profile design helps minimize binding on loose rocks. The Crusher especially is suited for river crossings and other jobs where gravel, sand and cobblestones are encountered. Melfred Borzall, Card No. 314