Unbreakable™ Handle Brass Sledge Hammer, 8 lb, 16 in L no checkout push pull grip and prevents accidental push pull grip and prevents accidental "kinking" which could cause hose ruptures Maximum working pressure 4500 psi 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 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