Felo 07157 51719 E-Smart Box with 12 Interchangeable Blades and Handle Each blade is tested to a voltage of 10,000 VAC and certified to 1,000 VAC Two tools in one with precision handle and "overhandle" Anti-roll handle design resists rolling on inclined or vibrating surfaces Precision machined black tips ensures the screwdriver tip always fits easily and precisely into the screw head Lifetime warranty