The 'Gripster' Grabs It with the Push of a Button Press the top of this unique tool and slim, stainless steel prongs emerge from the tip. Release pressure and the prongs close around the object, gripping it tightly. Position, insert or start hard-to-hold screws, nuts and small parts easily. 4-1/2 inches long overall. Prongs open to 5/8 inch. Set of 3.