Shop › 3.5" Spring Assisted Knife Drop Point Blade Image 1 of 1 3.5" Spring Assisted Knife Drop Point Blade $6.12 Spring assisted knife 3.5" 3D printed wolf drop point blade. 4.5" Closed. Stainless steel handle with wood overlay. Add To Cart Added! Spring assisted knife 3.5" 3D printed wolf drop point blade. 4.5" Closed. Stainless steel handle with wood overlay.