RUIKE S31 Multifunction Knife 2.79in 14C28N Stainless Steel Clip Point Plain Blade Black. Equipped with a stainless steel key ring and available multifunction tools the S series is great for those every day tasks. Specifications for RUIKE S31 2.79in Multifunction Knife: Manufacturer: RUIKE Blade Length: 2.79 in Closed Length: 2.79 in Blade Material: 14C28N Serrated: Plain Knife Application: Multi-Tool Color: Black Blade Shape: Clip Point Blade Finish: Plain Blade Thickness: 0.08 in Handle Color: Black Opening Method: Manual Package Contents: RUIKE S31 2.79in Multifunction Knife RUIKE S31-B: S31 Multifunction Knife 2.79in 14C28N Stainless Steel Clip Point Plain Blade Black