Socket 1/2" Drive Metric Standard 6 pt 14mm N-PowerFit Drive- Increased strength and reduces rounding or fastener damage by distributing stress through a gentle arc in the bore by enlarging the contact surface. . Designed for maximum strength with minimal wall thickness made possible by tough materials, advanced processing technology, and optimal heat treatement.. Optimal fasstener fit- Nepros industry leading tollerences reduces the fit gap with bolts and nuts to the absolute minimum, creating a superior fit feeling.. Exceptional surface finish- Proprietary hard chrome plating for anti-wear, anti-corrosion, and superior appearance.. Rubber ring prevents slippage and improves workability during hand-tightening.. Clear engraving- The beautifully-refined engravings are easy to see and increase the efficiency of work. NB4-14