A big problem with the miners' clothes were the pockets, which easily tore away from the jeans. A man called Jacob Davis had the idea of using metal rivets (fasteners) to hold the pockets and the jeans together so that they wouldn't tear. Davis wanted to patent his idea, but he didn't have enough money, so in 1872, he wrote to Levi Strauss and offered Strauss a deal if Strauss would pay for the patent. Strauss accepted, and he started making copper-riveted 'waist overalls' (as jeans were called then).