Ok.... they have been out for awhile and I scoffed at them..... then I tried them..... and promptly ordered them for the studio! These little things bite in and hold on and keep everything together while you work! No pins to poke you, no edges getting uneven while you work, they just simply hold it and do no damage to anything. Plane and simple lol there are 50 in the tub. Pink is also available, but not shown.