3 in 1 Socket set 23PCS include:
1/2”, 3/8”,1/4” Sq. Drive; 20PCS short standard Socket; Blow case

Material Specs.:
1/2 Sq. Dr.:            6150(CrV)
3/8,1/4 Sq. Dr.:      SCM440
Socket:                   CrV 
1/4”:  4, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13mm
3/8”:  14, 15, 16, 17, 18, 19mm
1/2”:  21, 22,24mm