Simon John Oxspring

Darron Tool & Engineering (Sheffield) Ltd. manufactures and provides drilling tools and engineering services. The company was founded on December 9, 1969 and is headquartered in Chesterfield, the United Kingdom.

Techman Engineering Ltd. Manufactures and supplies precision machined products. Its products include darron oil tools such as integral blade stabilizers, DR model 60 reamer, large hole range hole opener, hardfacting, sealed bearing roller reamers, single stage hole opener, stabilizer mendrels, and standard stabilizer sleeves. The company was founded on January 11, 1990 and is headquartered in Chesterfield, the United Kingdom.