They are engineered lighter to drive nails faster.
They have an extra nail notch built into the head, along with a magnetic nail starter.
These hammers have a traditional leather handle grip made from sole leather washers, pressed on and rivetted.
Made in the USA from high quality steel.
The ESTE19S Ultra Framing Hammer has the following specifications:
Weight: 540g (19oz)
Handle length: 349mm (15.1/2in).