IDEAL Electrical Twist-A-Nut™ 21-in-1 Ratcheting Screwdriver is a versatile tool with multiple bits and premium features. The ergonomic, slip-free grip handle of the screwdriver is equipped with multi-bit storage, accu-loop wire looping device, and wire connector wrench. The added strength of the vanadium-steel constructed shaft keeps the ergonomic screwdriver resistive to abrasion and corrosion. The driver bit set includes: 3 Phillips (#1, #2,#3), 4 Star bits (#15, #20, #25, #30), 3 Slotted/Flat Bits (3/16 in., 1/4 in., 5/16 in.), 4 Hex (3/32 in., 1/8 in., 3/16 in., 5/32 in.), 2 Square (#1, #2) and 3 Nut Driver (1/4 in., 5/16 in., 7/16 in.)