Chrome Molybdenum alloy steel for long life. Fully guaranteed. Heavy duty blow molded case Set includes: SAE Standard sizes: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2 and 9/16; SAE Deep sizes: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2 and 9/16; Metric Standard sizes: 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm and 15mm; Metric Deep sizes: 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm and 15mm; SAE Universal sizes: 1/4, 5/16, 3/8, 7/16, 1/2 and 9/16; Metric Universal sizes: 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm and 15mm; Internal Star Sockets sizes: T10, T15, T20, T25, T27 and T30; 1/4 Drive Universal Impact Joint; 1/4 Drive 1/4 Female x 3/8 Male Adapter; 1/4 Drive Extensions: 2, 4 and 6.
