The D5 Descender Has A Double Safety Locking Mechanism, Which Means When Loaded, The Side Plates Cannot Be Rotated Open Due To The Positioning Of The Carabiner And The Push Button Click Lock Safety Closure. The D5 Is Easy To Attach/Detach From Rope Without Detaching From The Operator*s Harness, Therefore Eliminating The Risk Of Accidental Dropping Of The Device. It Is Easy To Back Feed The Rope Through The D5 And Therefore It Can Be Used For Smooth Ascending Or For Emergency Hauling (When Used As Part Of A 2:1 Z Rig).table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }