Product Description The Snap-On JH Williams 4-648 1 1/2-Inch shallow impact socket has an overall length of 2-Inches and a 1/2-Inch drive. The super torque lobular openings are for greater turning power without deforming the fastener. This socket has been designed for maximum engagement on 6 point fasteners and is suitable for use with pneumatic and electric impact wrenches. It has been specially heat treated for impact use to provide long life, safety, and durability. From the Manufacturer The JH Williams 4-648 1 1/2-Inch shallow impact socket has an overall length of 2-Inches and a 1/2-Inch drive. The super torque lobular openings are for greater turning power without deforming the fastener. This socket has been designed for maximum engagement on 6 point fasteners and is suitable for use with pneumatic and electric impact wrenches. It has been specially heat treated for impact use to provide long life, safety, and durability.