Above, the only two K-D tools I've encountered.
Harry W. Kulp and Martin C. Dellinger founded the K-D Manufacturing Company in Lancaster in 1919. Their first products were valve spring tools resulting from multiple Kulp/Dellinger patents. In 1923, the company became a registered corporation. In 1957, the company was sold to Mr. George W. Marshall, Jr. Ten years later the company moved into a new factory and also aquired the L.O. Beard Tool Company of Lancaster. METCO Corporation bought K-D in 1969, which in turn was acquired by Easco in 1982.