G10 Glass Fiber No Metal Knuckles For Self DefenseMade of G10 Fiber Glass material, light but very solid Ergonomic design, amiable for your fingers One Piece CNC processing, all edges have chamfers 14mm Super Thickness, will bring a better comfortable grip feel Can be also used as a self defense kubotan Great EDC KNUCKLES Size: 130mm x 74mm x 14mm Big holes, can fit for fat fingers Only 80g, very light