12 Point Standard SAE Sockets 3/8 in Dr 7/8 in Opening Crescent 12 Point Standard SAE Sockets Opening Size [Nom]: 7/8 in Width [Nom]: 1.3 in Drive Type: 12 Point No. of Points: 12 Drive Size [Nom]: 3/8 in Tip Type: 12 Point Language: English Material: Alloy Steel Measuring System: SAE Wt.: 0.21 lb Finish: Full Polish Chrome Tip Size [Nom]: 7/8 in Type: Socket.