Steel teeth bits series: 

1).Soft formation teeth bits:

The soft formations tooth bits are used to drill lowcompressive strength, soft formations. Long projection toothlengths are used on high offset cones to provide the greatestpenetrations rates possible. Wear resistance hard facing is used tocontrol tooth wear. On the softest bit types this hard facingcompletely covers the bit teeth.

2).Medium hard formations tooth bits:

The medium hard formation tooth bits are used to drill highcompressive strength, medium hard formations. Shoot projectionteeth with reduced crest length are used in this series of bitdesigns. Durable hard facing is applied to reduce toothwear.