Thumb Screw for the Synthes Recon Locking Aiming Arm for Lateral Entry Femoral Nails-EX (part number 03.010.048) and the Thumb Screw for the Aiming Arm for Titanium Cannulated Tibial Nails-EX (part number 03.010.052). || The Recon Locking Aiming Arm for Lateral Entry Femoral Recon Nails- EX is used when locking the Femoral Nail-EX. The Aiming Arm for Titanium (TI) Cannulated Tibial Nails-EX is used when locking the Tibial Nail-EX.