Hazard 4 Patented Rotor Locking Buckle 2in Black. Sling packs especially need super-reliable buckle lock-up since the pack drops if they disengage. Every pack brand has used no locks or a stock lock-buckle. Ours is a better design that locks totally can't disengage inadvertently has big parts that are unlikely to fail/tolerate moulding flaws better and is easy to repair. It also allows the male part to unlock the switch if in the locked-position. Anyone familar with an AR15's safety will know exactly how it works. But this can be used with thick gloves. It is being rolled out selectively to 2'' webbing positions - like in our Plan B '17 modernized sling pack (slings page). Use this as a spare or replacement buckle for Hazard 4 products. Specifications for Hazard 4 Patented Rotor Locking Buckle: Manufacturer: Hazard 4 Size: One Size Weight: 1.8 oz Pack Application: Casual Quantity: 1 Fabric/Material: Plastic Width: 2 in Application: Around Town Tactical Work Duty Seasonal/Temperature Use: All Seasons Age Group: Adults Gender: Unisex Features of Hazard 4 Patented Rotor Locking Buckle Super-reliable buckle stays locked and does not disengage inadvertently if the pack drops Big parts are unlikely to fail/tolerate moulding flaws better and is easy to repair Allows male part to unlock the switch if in the locked-position; Anyone familiar with an AR15's safety will know exactly how it works Can be used with thick gloves Includes (1) pair of female and male parts. Package Contents: Hazard 4 Patented Rotor Locking Buckle Hazard 4 ACS-RTO-BLK: Patented Rotor Locking Buckle 2in Black