Petrified Fish Trilobite Button Lock Ultem SW PFK17UW. 16cm) closed. 3" (7.62cm) stonewash finish 14C28N Sandvik stainless reverse tanto blade. Amber Ultem handle. Extended tang. Thumb pull. Lanyard hole. Pocket clip. Boxed. Specifications for Petrified Fish Trilobite Button Lock Ultem SW: Manufacturer: Petrified Fish Blade Length: 7.62 cm 3 in Closed Length: 10.2 in 4 in Package Contents: Petrified Fish Trilobite Button Lock Ultem SW