KAISER Precision Tooling Ltd., Rümlang, Switzerland, reports that it has strengthened its long-term partnership, BIG Daishowa Seiki Co. Ltd., Japan, by agreeing to be acquired by the BIG Daishowa group as of April 15. KAISER Precision Tooling, a supplier of modular boring tools, and BIG Daishowa Seiki, a producer of toolholders and measurement devices, have had a technology and distribution partnership since 1980.