Profile: Bakersfield Bit & Tool offers a complete line of casing section mills and under reamers and services. We offer rock bit lubricants, bearings, cutting structures and hydraulic designs while taking into consideration the extreme conditions found down hole. Conventional under reamer features durable construction and reliable power. Entire tool is made from 4140 heat-treated steel, making a strong, and durable tool. Cutter arms are forged, not simply cast. They feature full-length stabilizer pads able to sustain more torque while under reaming.