The Benchmade 119SBK Sibert Arvensis Knife Black G-10 Black Serrated Edge. Shane Sibert designed this heavy-duty fixed blade for Benchmade. The Arvensis is a big knife that has a "light hand feel". The nearly 6.5" blade has a pronounced clip point profile and includes a large choil for choking up on. Contoured black G-10 scales are fastened to the full-tang 154CM steel BK-1 black blade with tube pins and straddle the fine line of comfortable grip. The Arvensis includes a Boltaron sheath with an innovative attachment feature.