Boss b18 squaring hammer

The First Hammer that can Square, Measure and Swing. 18oz Hybrid High Performance Hammer Features- Flat shoulder and claws for an integrated squaring system- Can square up to a 2x10 in one line*- Includes common cuts and degree markings typical of a framing square- 4340 steel head & 49-51 Rockwell Hardness, much tougher than most other hammers made from 4140 steel- Overall weight ~ 26.2 oz- Magnetic nail starter accommodates double-headed nails- 16 inch out-to-out dimension for laying out framing members- Handle made from hand-selected American hickory with linseed oil finish- Laser engraved markings for long lasting visibility - Made in America excellent for everyday use. excellent materials and excellent craftsmanship ensure long-lasting durability.