The Hogue Exploit deployment is based around a strong, custom-designed, oversized coil spring that has been extensively tested and integrated to provide force along the pivot's entire range of motion. The double-action deployment OTF models utilize extension springs to produce an impressive, repeatable deployment and a PVD coating for enhanced wear protection. The result is an automatic that kicks open with authority every time you call on it. Each knife is individually tested and laser-etched with a unique serial number before it bears the Hogue name.