Vat no GB 138 1653 12. Estwing E6/15SR Ultra Claw Hammer NVG 425g 15. Oz brand new inc vat. Estwing's Ultra Hammer Series are made in the U. These hammers are light, they drive nails faster and forged in one piece out of fine tool steel for long life and dependability. Ultra Hammers are designed with the professional in mind. An extra nail pulling notch is built into the head of our hammers for use in tight spots, along with a magnetic nail starter in the hammer head. Ultra hammers are stronger because they are forged in one piece of steel, no welds, no joints that can fail. This ...