Our carabiners for promotions are made of fine aluminum. Various colors can be anodized--traditionally red, green, black, silver, blue, purple, gold and non-shiny silver. Conventional shapes include round, flat and bar, respectively categorized as CR, CF and CB series. The longest style is 3 1/8 inches, aluminum diameter of 8 mm. Other lesser sizes are available. Please specify your requests; we will provide pertinent reference. Customer logo or/and slogans, can be laser engraved on various locations, in a silverish shade. Closest accessories to our keychains are split keyrings of normally silver and gold colors. Your own designs are welcome. Trial samples by hand on lathe will help finalize your ideas. Then a set of tooling will be made, usually taking about 3 weeks. Close price estimate is made in advance, some small adjustments are needed after samples.