This T-bar driver set comes with 9 sockets and 11 bits and is made of chrome vanadium steel. The quarte-inch bits are secured in a plastic holder. It has a powerful magnetic chuck and includes (1) T-bar driver, (3) Philips bits #1, #2 and #3,(3) star bits t15, t20 and t30, (5) slotted bits 516, 14, 316, 532, and 18 and (9) sockets 316, 732 14, 516, 1132, 38, 716, 1532, and 12.