STEER Engineering [P] Ltd offers Long Tri-lobed Transition Element with Regular Lead. STEER Engineering [P] Ltd is an ISO 9001 certified company. Long Tri-lobed Transition Element with Regular Lead or Long Tri-lobed Undercut to Deep-flite Transition Element with Regular lead is a transition from a Undercut [SK] profile to a deep-flight profile. Such deep-flight profiles are especially useful in the intake zone for low bulk density material.