This keeps the tube from threading and helps eliminate spiraling
Overall Length [Nom] : 30 in
molded insulation meets or exceeds IEC 60900 and ASTM F1505 standards for insulated tools
Two coaxial spring-loaded 24 and 19 mm socket sizes in one tool
Interior hook prevents twisting during bends
Klein Tools 32807MAG Klein Tools 7-In-1 Nut Drivers Power & Hand Tools Xmas Sales This keeps the tube fromFeatures 7 in 1 Nut Driver Strong, rare earth magnets securely hold 1 4 in, 5 16 in, 11 32 in, 3 8 in, 1 2 in nuts and bolts in place Spring coil holds nuts and bolts in place without the use of 7 16 in, 9 16 in magnets Hollow shaft for driving nuts deep onto 1 4 in, 5 16 in, 3 8 in, 7 16 in, 9 16 in bolts or threaded rod Heavy duty handle and shaft exceed the torque performance of regular nut drivers Wrench assist on handle for added torque on tough