This Snap-on 113TMMY 1/4 drive metric socket set includes 13 pieces with 6-point drive type and chrome surface finish. The set contains sockets ranging in size from 4mm to 15mm, including 5.5mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, and 15mm. The set is made in the United States and comes with a standard socket type, SAE system of measurement, and tools included are sockets.