Ontario Knife RAT Model II Folding Knife Black Handle OK. This knife by Ontario Knife has a blade length of 3 inches with a satin finish over AUS-8 steel. The satin coat finish gives the Ontario Knives Rat II Folding Knife a sleek professional look. When you need a knife that is built for durability and can handle just about anything you need the Ontario Knife Rat 2 Folding Knife. Specifications for Ontario Knife Rat II Folder - Satin Blade: Hardness: 58-59 HRC Blade Thickness: .095in (.2cm) Blade Length: 3 in (7.6 cm) Weight: 2.8oz (.79kg) Features of Ontario Knife Rat 2 Folding Knife: Folding Satin Blade Finish Flat Blade Grind AUS-8 Blade Package Contents: Ontario Knife RAT Model II Folding Knife Ontario Knife OK8861: RAT Model II Folding Knife Black Handle