Holton Continuous Rotary Extrusion Science & Technology (Crest ) Limited, the only authorised supplier of Outokumpu Holton Ltd original equipment manufacturer (OEM) designed and supplied equipment. We provide full services for continued efficient running and development of the technologies. We can supply either original Holton or our own enhanced design machines, parts, tooling and upgrades for C300, C2000, C400 and C500 continuous rotary extruders and supporting equipment.