 In contrast latch-hooking uses a hinged hook to form a knotted pile from short, pre-cut pieces of yarn.Wool strips ranging in size from 3/32 to 10/32 of an inch (2 to 8 mm) in width are often used to create hooked rugs or wall hangings.These precision strips are usually cut using a mechanical cloth slitter; however, the strips can also be hand-cut or torn.