Brand: Astro Pneumatic Tool Company Manufacturer's Part Number: 78310 Part Type: Sockets and Drive Bits Product Line: Astro Pneumatic Tool Company Nano Impact Sockets Summit Racing Part Number: APT-78310 UPC: 745227025183 Socket/Bit Style: Standard Impact Rated: Yes Number of Pieces Included: 10 Socket/Bit Piece Count: 10 Ratchet Included: No Extensions Included: No Swivel Extension Included: No Socket Material: Chromoly Socket Finish: Black Case Included: No Quantity: Sold as a set. Notes: Includes aluminum socket holder. Socket Drive (Application): 3/8 in. Short Well Socket Type: 6-point Additional Information Short Well Socket Size 1/4 in. 9/32 in. 5/16 in. 3/8 in. 7/16 in. 1/2 in. 9/16 in. 5/8 in. 11/16 in. 3/4 in. Astro Pneumatic Tool Company Nano Impact Sockets Astro Pneumatic Tool Company Nano impact sockets are forged from chromoly (CR-MO) with superior material thickness between socket body and drive compared to other sets. Available in a choice of drive sizes， Nano sockets are offered in both metric and SAE sizes that include an aluminum socket holder. All sockets feature an outside hex for increased access when used with a wrench， and all are sized marked for easy identification. Astro Pneumatic Nano 3/8 in. drive socket sets feature:* 0.88 in. (22.5mm) long， sockets are 35 percent shorter than shallow impact sockets and 15 percent shorter than other stubby impact sockets* 17mm outside hex for increased access when used with a wrenchAstro Pneumatic Nano 1/2 in. drive socket sets feature:* 1.10 in. (28mm) long， sockets are 37 percent shorter than shallow impact sockets and 15 percent shorter than other stubby impact sockets* 22mm outside hex for increased access when used with a wrench