1/4"sq. Extension Bar*Scroll right to see all columnsE p> No. D (mm) L (mm) Weight (g) NBE2 025 25 mm Extension 12 25 14 NBE2 050 50 mm Extension 12 50 26 NBE2 075 75 mm Extension 12 75 36 NBE2 150 150 mm Extension 12 150 66 *Made in Japan Magnificent form for excellent torque transfer Elegant form was created by stress analysis. This form prevents twisting stress from being focusing on one particular point. This achieves excellent torque transfer and smooth feeling