Our NEW stainless steel sockets and drivers are a must in anyone's tool kit. Based on a 3/8" square drive, there is a simple "T" bar driver, a speed driver, cranked handle, (not illustrated) and three extension bars of 2" 4" and 6". Tuck a basic set away, knowing that when you need it, it will be available and ready to work. Made in 17.4 grade stainless steel, hardened to 44 H.R.F.