1.Diameter: 105mm(4 1/8 inch) 2.Part No.105MM40FF 3.No.Buttons: Outer:7*14 Front:6*13 4. Flushing holes: 2 5. Weight: 7.7kg Applications: 1.Suitable for high pressure drilling rigs 2.Water well drilling 3.Record breaking penetration 4.Exploring Civil Engineering Applications 5.Lowest cost per foot drilled 6.Simple & robust design 7.Exploring Civil Engineering Applications 8.Foot Valve not required in the bit 9.Longer parts life 10.Maximizes efficiency 11.Develops greater power for any compressor capacities