Eagle 1/2 is made with an extremely wear resistant matrix for long life in soft formations, but can also be used in medium broken formations.
Eagle 3/4 is a good choice for cutting soft to medium formations.
Recommended for low powered drills only.High loads will seriously reduce bit life.
Eagle 5/6 is a general purpose formula for cutting formations in the medium hard range. 5/6 also works well in formations of variable hardness.
Eagle 7/8 Series is a general purpose bit for cutting hard formations. For hard competent and nonabrasive formations. This free cutting bit requires high rotational speeds and light bit loads for best performance.
Eagle 9/10 is made to cut ultra hard fine grain formations. This is an alternative when drilling very hard formations with a low torque drill rig.