1. Is is professional socket set 2. Material is 45#carbon steel or 40CR 3.Ratchet hand is technique from Taiwan

Pcs	Contents		Material
12	3/4" Dr. Socket : 19-50mm		carbon steel or 40cr
2	3/4" Dr. Extension Bar:   8" & 16"		carbon steel or 40cr
1	expansion link ratchet handle		40cr
1	1/2*3/4 change adaptor		carbon steel or 40cr
	Blow +Alu-case		Pe+Aluminium
16

16pc 3/4"professional socket set