Positive Locking Kit is the Safety Tie Line and Stabilizer Strap for all CenterShot, New BuckShot BigShot, Equalizer treestands from 2002 and later. Displayed on the Equalizer Treestand in pics. All foot platforms would have cross bracing. Older BuckShot Treestands with mesh foot platform use the Universal Stabilizer Strap found in BuckShot Parts Store