Text Box: BiCenter Drill Bits & Core Bits were first invented and patented by the late Mr. Ed B. Williams, Jr. of Williams Bit & Tool in 1954. Those patents lapsed just before the advent of PDC and TSD cutters but basic concepts of Mr. Williams' designs endure today. Having personally worked for Mr. Williams, we adhere to his original BiCenter design foundation. We offer the BiCenter feature in almost any product we make.