G10 Glass Fiber No Metal Spiked Brass KnucklesMade of G10 Fiber Glass material, extremly solid Ergonomic design, amiable for your fingers One Piece CNC processing, all edges have chamfers 21mm Super Thickness, will bring a better comfortable grip feel With End Protuberance, Can be also used as a self defense kubotan Best Real Brass Knuckles Size: 128mm x 79mm x 14mm Finger Hole Size: 29mmx 24mm, Big holes, can fit for fat fingers 192 grams