HDD Supply's High-Strength, (Box X Box) transmitter housings are manufactured from a single billet
of 4142 heat treated chrome-moly steel with a tensile strength of 150,000 psi. 
These housings are designed for use with Dirt Bit Subs, Rock Bits, Cobble Bits, Tri-cone Bits and Mud Motors.  
Also, these housings feature our new door locking "Cross Pin Assembly" for positive door   
retention.