Columbia River Knife & Tool P.S.D. Folding Knife, Black, Veff Serrations, 3.63 Blade, 1.4116 Stainless Steel,Assisted Opening w/ IKBS, Liner Lock, Black Carbon Fiber w/ G10 Base Handle 7920K Break it down to brass tacks: the P.S.D. is made to slice. This everyday carry folding knife's blade is designed with a full recurve" a highly efficient double grind" and Veff Serrations.. And" with Assisted Opening" it shows up to work in the blink of an eye.