Description of Benchmade 550SBKHG Griptilian Pardue Knife It's the 550HG and the 555HG Griptilians... and they have evolved for 2007. both models feature hollowground blades and ambidextrous round thumb-hole openers. With multiple blade styles, sizes and colors your Grips just got a little wilder... Grrr! Features: Two Sizes Available Ambidextrous Thumb-Hole Opener Lightweight Molded Handle Hollowground Blade Multiple Configurations Available Country of origin: USA Blade Length: 3.45" Blade Thickness: 0.115" Blade Material: 154CM Stainless Steel (550T: 440C) Blade Hardness: 58-61HRC Blade Style: Hollowground Modified Sheepsfoot; Ambidextrous Thumb-Holes Weight: 3.25oz. Clip: Tip Up, Reversible, Black Lock Mechanism: AXIS Overall Length: 8.07" Closed Length: 4.62" Sheath Material: Sold Separately Class: Blue ComboEdge® BK Coated Hollowground Modified Sheepsfoot Blade with Round Thumb-Hole Opener Black Glass Fill Noryl GTX® Color Valox® Handle Scales