Large thumb hole for opening CPM stainless steel blade Compression Lock The Spyderco Yojimbo 2 Folding Knife was designed by noted knife and martial blade craft expert Michael Janich. The Yojimbo 2 features a Wharncliffe style blade which is known for its ability to make impressive cuts even when in a small package. To do justice to the excellent blade design, Spyderco chose to make the blade from CPM Stainless Steel which offers excellent edge retention and durability. The ergonomic handle scales are meant to naturally orient the knife in your hand and encourage a thumb-forward grip allowing users to put more force into cuts and slashes.