Working with a large producer of quality pliers, we designed the body, handles and jaw tips of this spreading plier to provide more comfort and durability with easy spring return action. Hefty handles fit perfectly in the palm of your hand for delicate control and maximum gripping power. How it works: The jaws of these pliers are notched along their exterior in stepped pairs. Place the wire or ring of metal in the appropriate notch set that matches the item's beginning size and squeeze the handle to spread the item open. The further down the jaw the item is placed, the more force that can be applied to the spreading action. Step sizes from tip to base are: 3/16", 7/32", 21/64" and 25/64". When fully opened, the stepped tips spread to 7/8" and the lowest notch spreads to nearly 3/4". Plier includes a lifetime warranty against manufacturing defects.