6mm carabiner. Metal split key ring. Laser engraving recommended. Not intended for climbing. Engraves white. Colours: Black,Blue,Green,Purple,Red. Sizes: 33mm(w) x 58mm(h) x 4.7mm(d). Packaging: Bulk Packed. Materials: Aluminum. Decoration Area: Max Dec Area: 3mm (H) x 31.5mm (W). Price includes: NI Printshop - Laser Engraving Per Position. Setup is included.