About A Tech Authority



Q-Mark Manufacturing Inc. is rooted in Southern California's proud manufacturing tradition history.  Q-Mark’s president and founder, Mark Osterstock, apprenticed in precision metalworking as a teenager in his father's twelve-man tool and die shop in Inglewood, California. Today, Q-Mark Manufacturing proudly manufactures probe styli in its world-class Southern California facility and serves manufacturers around the globe.  Q-Mark products are proudly made right the first time in the USA. 

Probes & Styli
Probes & Styli

Probing systems transform your manufacturing process and increase profitability no matter your machine, application or difficulty.