SDI Quality
(800) 794-2345
1360 E Locust St. Ontario, CA 91761, Ontario, California, 91761
About us
"SDI is a family-owned company that operates under a very important motto: Quality is Job #1.
SDI was started by Michael James Patrick Shannon in 1990 out of his own home garage. Since then,
our company has evolved from a small home-garage business to a successful large-scale company employing over 65 people."
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