About this item    【Durability】: AOBEN socket set made from Hardened Treated Chrome Vanadium Steel Alloy (Cr-V), can withstand extreme levels of torque changes against fasteners.     【Corrosion-Resistant】: Manganese phosphate coating can improve wear resistance and corrosion resistance,can effectively extend the service life of the socket.     【Laser Marking】: High-contrast size marking is permanently laser etched and easy to read, even in low light.     【SAE】: Deep: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4".  Shallow: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4.  Totally 16 Pieces.     【Metric】: Deep:8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm.  Shallow:8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm.  Totally 28 Pieces.     
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Item Length: 3 Inches
Material: Chrome Vanadium Steel
Drive System: 3/8-inch drive
Finish Type: Black Phosphate, Black oxide finish