These pins are perfect to use on knitting and crochet projects as they help to keep your project taut and in place. Reduces the number of pins you need to use in a project and allows you to apply a more consistent tension while blocking a wide area. The blocking pins can be stored in the plastic box and kept neat and organised while not in use. Box contains 25 blocking pins - 15 large and 10 small as well as 100 T-shaped pins. Do not wash.