The 0400st has all the features of the 0400, plus a partially serrated blade for additional cutting versatility. The Tanto-style military folding knife features SpeedSafe manual assisted opening for one-handed blade deployment. The modified Tanto blade with partial serration is built of S30V stainless steel for strength and is coated with Tungsten DLC (Diamond Like Carbon) for a non-reflective matte-black finish. The 0400st is thinner than most of the ZT folding knives, making it ideal for compact carry. While the front scale features friction tape inserts for a secure grip, the back scale does not have the tape, enabling an easier draw and storage in the pocket. A 5/16-inch pivot shaft adjustment enables tighter or looser blade deployment. Includes a dual mounting system for tip-up or tip-down, right-handed clip carry.