The SigTac Tactical Auto is more than simply a frontline folder. It offers the same kind of automatic performance needed by anyone who puts a knife into immediate service- quickly and reliably. The blade is made of ATS 34 steel and coated with a wear-resistant Nitron finish (the same found on the Sig Sauer pistols). The Tactical Auto features a CNC machined billet aluminum grip and a spine safety lock. Plain blade version.