Milton, 1300-SS-01, 3/8" Drive Shallow 6-Point Impact Socket Set, 6-20mm, Steel Coated Black Oxide Finish with Universal Joint & Extension Bars1300-SS-01 Includes Only:3/8 in. Drive Shallow 6-pt. : 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20mm (Metric) Impact Sockets3/8" Universal Joint3/8" x 3" Extension Bar3/8" x 6" Extension BarStorage caseFeatures:HIGH QUALITY STEEL: Sockets are made of cold-forged Chrome-vanadium steel to improve the properties, strengthen the material and make each socket's dimensions highly accurate. Coated in black oxide finish to increase toughness, reinforcing the steel and making it highly resistant to corrosion.6-20 METRIC SHALLOW FASTENERS: Most commonly used fasteners (also referred to as Standard sockets) provides a true 360° rotation of the socket end offers greater accessibility to any fastener at any angle, even in the most compact places6-POINT LOCK-ON DESIGN: Provides a solid pinless design connection to distribute professional-strength high-torque, preventing stripping and rounding off of fasteners. Works with impact drivers or manual drive tools6-POINT LOCK-ON DESIGN: Provides a solid pinless design connection to distribute professional-strength high-torque, preventing stripping and rounding off of fasteners. Works with impact drivers or manual drive toolsHIGH VISIBILITY LASER ETCHED: Comes with high-contrasted size markings which make it easy-to-read, even in low light. No more wasting time and guessing which socket is which.Milton impact socket sets are forged from the finest chrome-moly steel which provides the best strength and durability. Sockets are designed and crafted to take on the toughest jobs with solid performance. All sockets are marked with part number and size for ease of use.