B.A.S.H® Unbreakable™ Handle Sledge Hammer, 6 lb Head, 16 in Ergonomic Handle ORS NASCO and cotter shackles have thread and cotter shackles have thread protected ends and are 100% proof tested Standard industry tolerances apply Feature an exclusive safety collared deep slotted screw design that prevents screwdrivers from slipping and puncturing the hose wall Combo Hex clamps can be installed with a screwdriver Unbreakable™ Technology—steel core eliminates breaking during overstrikes Safety Plate—secures head to handle preventing head dislodging Ergonomic Handle—shaped and thickened for improved comfort and less vibration Non Slip Grip—vulcanized rubber handle for secure grip while striking Lanyard Hole—safely secure hammer to wrist or stationary object