Unbreakable™ Handle Brass Sledge Hammer, 8 lb, 16 in L no checkout High concentration of Zirconia and High concentration of Zirconia and heat treated Aluminum Oxide grain provides twice the cutting action of Premium Aluminum Oxide Discs and is extremely heat resistant Unique multi layer construction Designed to avoid the thin spots and pinholes common to single dipped supported gloves Launderable Non sparking brass head for safe use near combustible materials Non marring brass head helps absorb impact and reduce work damage Patented Unbreakable Technology steel core eliminates breaking during overstrikes Ergonomic Handle is shaped and thickened for improved comfort and less vibration Non Slip Grip vulcanized rubber handle for secure grip while striking