6 point box end Hex 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. Exceptional surface finish- Proprietary hard chrome plating for anti-wear, anti-corrosion, and superior appearance. Optimal fastener fit- industry leading tolerances reduces the fit gap with bolts and nuts to the absolute minimum, creating a superior fit feeling. Non-slip grip .