HDD Supply's side load sonde housings are manufactured from 153,000 psi chrome-moly steel for
superior strength and durability.  The side load feature provides quick and easy field installation 
and removal of transmitter sonde and batteries.  
All sizes feature:
1) replaceable tailpieces for long life,
2) screw-in, heat treated replaceable nozzles for maximum durability and steering, and  
3) Accepts all styles of OEM type bolt-on pilot bits (paddle bits).