Check out Karambit Brass Knuckles Low-poly 3D model on CGTrader for $3. High-quality mesh by Franklin-Fireheart: 1858 polys, 1838 vertices. PBR, Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 2.05 MB), OBJ (OBJ, filesize: 276 KB), FBX (Autodesk FBX, filesize: 1.35 MB), 3DS (3D Studio, filesize: 140 KB), OTHER (Other, filesize: 9.44 MB)