Buck 290BLS Rush 2-1/2" Includes Knife, Box, and Warranty Registration Card The Buck 290BL Rush features Buck's Patent Pending ASAP Assisted Opening Technology. The Rush Comes with a Skeletonized Anodized Aluminum handle in a Midnight Blue Color The blade is constructed out of 420 HC Stainless Steel, with a 3-3/4" closed knife length The Rush, as with all Buck Knives, features Buck's 4-Ever Warranty