BCB Commando & Survival Wire Saw Issued to British Special Forces (SAS). 28" length of 8 strand braided stainless steel wire with a metal ring attached to each end. Can cut wood, bone, and soft metals such as aircraft aluminum. Utilizes swivels at the wire ends to relieve torsion stress, adding much more life to the saw. NATO approved! NSN 5110 99 565 2549.