Heavy-Duty Keystone Tip Screwdriver 1/4" x 6". Square shank allows use of wrench or pliers for added torque. Precision-machined tips for exact fit. Handle marked for easy identification of screwdriver size, type and length. Strong, durable black phosphate tips prevent chipping of plating. Soft, cushioned grip for extra comfort and torque. Exceeds ASME/ANSI specifications. Lifetime limited warranty. Note: This is not an insulated tool.