Description BTS 3 Degree Offset Spindles The BTS 3 Degree Offset Spindles allow for doors fitted with Dorma BTS floor springs to overclose by 3 degrees. left and right hand spindle inserts available 3 degree offset suits single action doors suits BTS zinc plated Left hand moves anticlockwise Right hand moves clockwise Stand on the pull side of the door (the side you grasp and pull toward you). Notice: If hinge is on your left → RH spindle If hinge is on your right → LH spindle