Precision machined tips for exact fastener fit, strong durable black phosphate tips to prevent chipping or plating, handle marked for easy identification of screwdriver size and type, Soft, cushioned grip for extra comfort and no slipping, designed to meet ASME/ANSI specificationsGreenlee's four piece mini precision screwdriver set is made with heavy-duty construction for longer life. Handle marked for easy identification of screwdriver size, type, and length. Precision-machined tips for accurate fastener contact. Strong, durable black phosphate tips prevents plate chipping and reduces slipping. High-grade, rust resistant, chrome-plated finish. Soft, cushioned grip for extra comfort and torque. Exceeds ASME/ANSI specifications. Lifetime limited warranty. This is not an insulated tool.