【Material】Made of high quality hard alloy for durable use. Set includes: E4, E5, E6, E7, E8, E10, E11, E12, E14, E16, E18, E20, E22, E24. 【Compatible mounting range】1/4", 3/8", 1/2". 【Multifunction】Ideal for removing sockets, nuts, bolts, screws, etc. 【Blow-molded case】Comes with a sturdy storage case for easy transport and quick organization.