Unique speed-cut design allows for smooth draw and easy re-holster without slowing you down. BLACKHAWK! CQC (Close Quarters Concealment) holsters and accessories SERPA Technology is a simple-to-use active retention system that automatically locks the weapon as you holster it. To release, just press the lock device on the outside of holster with your trigger finger. The unlocking device is positioned right where your finger naturally rests. There is no awkward middle finger release or thumb break to slow you down. Adjustable fit belt loop allows for the ideal fit for belt sizes up to 1.75". This custom fit option helps to hold the holster in the proper position for comfort and proper draw.