10 pieces of 1/4" Drive 48mm Magnetic Sleeve in SAE sizes: 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2". 1 piece of 1/4" Drive 17mm Wing Nut Driver. DURABLE STRENGTH - Built to last with Cr-V and S2 steel for maximum shock resistance and hardness, this set features deep nut drivers, reinforced wall thickness, and manganese phosphate coating for superior durability.