Individually tested to exceed standards. Two layers of insulation provide protection against electric shock. Nine-piece insulated screwdriver assortment with three sizes of each tip style: cabinet, keystone and Phillips. Highly durable, black, nylon case that has the following features: coil-zipper closure, custom-fitted tool pockets, extra pocket is provided for storage of papers or other items. Kit includes cabinet-tip round-shank screwdriver 3/16 x 4 inch (601-4-INS), 3/16 x 7 inch (601-7-INS), 1/8 x 4 inch (612-4-INS), 1/4 x 4 inch (602-4-INS), 5/16 x 7 inch (602-7-INS), 3/8 x 8 inch (602-8-INS), Phillips-tip round-shank screwdriver no.1 x 4 inch (633-4-INS), no.2 x 4 inch (603-4-INS), no.3 x 7 inch (633-7-INS) and heavy-duty polyester case (33538).