Rough Ryder Trapper Smooth Bone A/O Assisted Opening Folding Knife Blue smooth bone. 4.13" (10.49cm) closed. Mirror finish stainless blade. Blue smooth bone handle. Nickel silver bolster(s). Boxed. Specifications for Rough Ryder Trapper Smooth Bone A/O Stainless Steel Assisted Opening Folding Knife: Manufacturer: Rough Rider Closed Length: 4.13 in Blade Material: Stainless Steel Handle Color: Blue Smooth Bone Lock Type: Linerlock Condition: New Weight: 0.32 lb Additional Features: Assisted Opening Quantity: 1 Color: Blue Package Contents: Rough Rider Trapper Blue Smooth Bone A/O