Tri Source™ Polar Solar Plus® Multiple Outlet Cord, 50 ft, 3 Outlets, Yellow ORS NASCO Folds up for storage ease 1" Folds up for storage ease 1" square tube base construction Quick action lock washer for fast height positioning Patented Fall Guard™ feature allows 1" safety zone around lock washer Split bite jaw increases grip over standard bite chucks by providing more contact with the bit Superior gripping force provides high mechanical advantage to convert hand tightening torque into superior bit gripping force Hammerlock® mechanism is a positive locking mechanism that prevents loosening in hammer and other high vibration applications Anti lock nut prevents chuck from lock opening Precision operation that meet or exceed stringent din run out and dimensional specifications Heavy duty strain relief protects electrical connections resulting in longer cord life Outer jacket is flame retardant and water resistant Reinforced blades help prevent accidental bending or breaking