The Klein 612 4 Terminal Block Screwdriver s precision machined tip provides an exact fit for terminal block screws. The terminal block screwdriver has a shank length of 4 Inches and width of 1/8 Inch, and an overall length of 7 3/4 Inches. The 612 4 screwdriver has a tip up to 19% stronger than its competitors. The tip provides 76% higher torque value than the required ASME B107 standard. The cushion grip handle offers greater torque comfort. Since 1857, Klein Tools has manufactured the world s finest hand tools. Today, Klein Tools is the 1 choice among professional tradesmen. We manufacture more than 3,000 tools and accessories, including pliers, cable and bolt cutters, wire strippers, voice data video tools and testers, fish tapes, conduit benders, drill bits, insulated tools, gloves and many other high quality products. Klein Tools dedication to quality and innovation continues with products available for professional tradesmen worldwide.