Jetech 13PCS 3/8 Inch Drive Standard Impact Socket Set, Made with Cold-Forged, Heat-Treated Chrome Molybdenum Alloy Steel, 6-Point Design, Metric Size Includes from 7mm to 19mm with Steel Holder Rail - FK3ov8-13SJ

• SET INCLUDES - 13pcs 3/8in drive metric size: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, and 19mm. It comes with a steel holder rail to keep them in position. Cr-Mo ALLOY STEEL - Cr-Mo impact socket features with added hardness, higher working temperatures, and corrosion resistance. Much stronger to stand greater impact force than chrome vanadium ones. COLD FORGING & HEAT TREATMENT - Greatly improve their performance with enhanced strength, increased wear-resistance, and lifespan. Black phosphate finish is for corrosion and wear-resistance. 6-POINT & RADIUS CORNER DESIGN - Gives an exact and snug fit, allowing it to apply more torque and avoid slipping off. Prolong the lifespan of fastener and socket with force distributed to the inwall. SECURE ATTACHMENT – Features with a pin hole in the square drive end of each socket to apply a retaining ring or pin, making sure the socket be securely attached to the square drive of an impact tool.