... -40cr with heat treatment -high quality tool YD-1020121pcs socket wrench tool set(1/4"&3/8"&1/2")CONTENTS:10PCS-SPANNER: ... ,14,15,17MM17PCS-3/8" DR. BIT SOCKETS: T20,30,40,45,50,55,60 HW3,4,5,6 PH1,2 ... G.W./N.W. Q'TY48x38x19CM 20/19KGS 2SETS 121pcs socket wrench tool set(1/4"&3/8"&1/2")(YD-1020)