Set of 6 Slotted & Phillips Tip Insulated Ergonic Screwdrivers. Impact-proof handle w/hanging hole for easy storage or inserting lever. Set includes slotted sizes: 1/8 In. x 4 In., 5/32 In. x 4 In., 7/32 x 5 In., 1/4 In. x 6 In. and philips sizes: PH 1 x 3-1/8 In., PH 2 x 4. the 3-component Ergonic screwdriver handle was designed by Felo as the next-generation in ergonomic design, comfort and functionality. The Ergonic handle surface actually conforms to the users hand, creating a form fitted connection between hand and handle. By distributing the turning force across the entire hand, this revolutionary handle eliminates pressure points, relieves hand strain and allows for maximum torque transmission from hand, to screwdriver tip (up to 85% more than competitor tools). Each blade is tested to a voltage of 10,000 V A.C. and certified to 1,000 V A.C. vie tests are performed according to IE