11. The anchor according to claim 9 , wherein the transfer structure is constructed of an alloy selected from cobalt chrome and titanium alloys.
9. A bone anchor comprising: a) a receiver having a channel adapted to receive one of an elongate member and a tensioned cord; b) a pressure insert positioned in the receiver and having upward extending arms and each of the arms having upper surfaces; c) a sleeve positioned in the channel above the pressure insert, and in combination with the one of an elongated member and a tensioned cord; and d) a closure that is positioned in the receiver above the sleeve, wherein the sleeve includes a sleeve body constructed of a non-rigid deformable polymer and a transfer structure constructed of a rigid non-deformable metal; the transfer structure having depending legs with lower surfaces that align and mate with the upper surfaces on the pressure insert arms in an overlapping relationship for transferring force from the closure through the transfer structure to the pressure insert without transferring pressure directly through the deformable body of the sleeve to the insert, the transfer structure having projections extending therefrom and into the sleeve body to resist torque of the transfer structure relative to the sleeve body.