About this item DURABLE MATERIAL: Made of chrome vanadium steel for resistance to deformation and high-temperature treatment for increased durability. Sockets are also treated with black manganese phosphate for enhanced wear and corrosion resistance ADEQUATE SIZES: Set includes: SAE : 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1". Metric : 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm. Accessory: 3", 5" Extension Bar and 3/8" (F) to 1/2" (M) socket adapter EASY SIZE IDENTIFICATION: High-visibility laser etching and permanent stamped marking for quick and easy socket size identification, even in low light conditions 6-POINT DESIGN: The 6-point design of the sockets prevents round-off on nuts and bolts during high torque and impact stress CONVENIENT TO USE: Sizes are printed next to each socket for quick identification, and the set comes with a hard-shell storage case with shock-absorbing cotton to protect against damage during transport QUALITY & SERVICE GUARANTEE: The deep socket set Meet & Exceeds ANSI (The American National Standard Institute). Brand: Material: Chrome Vanadium Steel Finish Type: Polished Number of Pieces: 29 Drive Bit Shank Style: Straight