Associated Directional Drilling has used several different sonde housings with various conventional allen-set screw configurations, only to have the set screws and bolts back out while drilling. As a result, our directional drillers lost several sonde housings / probes and encountered a variety of down-hole problems, such as clock rolling to a false position which led to mislocations. ATW has invented and produced a fully adjustable clock side-door sonde housing which does not use allen set screws or bolts (patents pending). With this design, it requires less than 60 seconds to adjust the clock or remove the sonde / probe. The reliability of accuracy is virtually 100% and the speed of operation is also increased considerably.