STEER Engineering [P] Ltd manufactures Bi-lobed Conveying Element with Serrated Splines. STEER Engineering [P] Ltd is an ISO 9001 certified company. Bi-lobed Conveying Element with Serrated Splines is a short lead element available with keyway. The serrated splined shaft has a straight sided spline geometry with an included angle. An included angle of 60 degrees is used by WP.