Ball end 13 pc inch .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16" and 3/8". Up to 20% stronger than competition, longer wear, tighter screws, dry, corrosion resistant finish, 5x more resistant to rust or corrosion than plated finishes, provides better tool grip. Saves time, screws can be turned continuously without repositioning tool. Ball ends automatically funnel Into screw heads. 25˚ angle is the perfect balance between ball end strength and working angle. Bondhus 10937 BLX13