Hobby tack covers the entire range of real horse tack, from numnahs to full saddle sets; from simple barn halters to extravagant multiple horse harness hitches; and from stable blankets to hand-stitched Arabian horse costumes. They are made out of a variety of materials such as leather hide, leather lace, satin and grosgrain ribbon, jewelry chain, and various fabrics. Hardware can be made by hand out of wire, or cast metal such as pewter and white bronze. Much research goes into making high-quality tack, with some tack makers accumulating reference libraries of online image folders and books. Tack can be made from scratch, or using kits. Knowledge of leather stamping, carving, dying, and sewing are all skills the model horse tackmaker uses in his or her craft.