Drive: 3/8" Socket Length: 1-1/8"Fits Screw Size: 5/16" And 3/8"Fits Nut Size: 10/24", 10/32", 1/4" And 6mmFor Use With Tri-Groove FastenersNot For Use With Pneumatic And Electric Impact WrenchesSocket Length May Vary Slightly, Contact To Confirm If Needed