Want a better price reach out via different platforms These bits are longer than your standard bits about 4 ft long Heavy duty builtDigging hole diameter: 200-450mmOperating flow: 50-75L/minOption A with 12'' drill Option B Including the 12'' and 18'' drillDrill 9''/ Drill 12''/ Drill 18'' nom. Pressure 12--14MPa when no loadpressure 16--20MPa when loaded.