Douk-Douk Folding Knife 3.125in 3.125in Carbon Steel Black Steel Handle DD815. 125in is made using incredibly durable materials and construction that will keep you slicing and cutting for years to come. Specifications for Douk-Douk Folding Knife 3.125in: Manufacturer: Douk-Douk Blade Length: 3.13 in Closed Length: 4.375 in Blade Material: Steel Knife Application: Folding Blade Handle Color: Black Quantity: 1 Package Contents: Douk-Douk Folding Knife 3.125in Douk-Douk DD815: Folding Knife 3.125in 3.125in Carbon Steel Black Steel Handle