A method for knotlessly securing suture in a bone tunnel including securing a suture to a tissue to be fixated by a suture anchor； preloading a proximal threaded component of an anchor onto a drive shaft； preloading a distal component of the anchor onto an actuator shaft, passing the suture through an eyelet of the distal component of the anchor, inserting the distal component of the anchor and then the proximal component of the anchor into the bone hole； confirming the placement of the proximal component of the anchor relative to the distal component of the anchor by viewing an indicator on the driver handle； and pivoting a trigger device about a pivot axis to translate the actuator shaft to a second position to compress the suture at the distal end of the proximal anchor and to lock the distal anchor to the proximal anchor.
