The QI is an inside the waistband holster perfect for easy carry,concealed carry and easy storage. The QI will accommodate multiple firearms in varying lengths and sizes. It has a push-button mount for fast, simple attachment to belts, easy to adjust belt width, locking button for worry free security and multiple holes for 270 cant adjustment.The all Kydex body provides a custom fit to each firearm and maintains its shape even with the pistol un-holstered. The dual sided multi option mounting block allows user to wear it left or right handed. The mount holes are compatible with all industry mounting options for belt, molle or thigh holsters. The holster will accommodates up to .5 high night sights, suppressor sights and rear sight mounted optics. This holster is approved for use in all competitive shooting sports: USPSA, IDPA, 3 Gun. The size 1 holster fits- Glock 9/40/357 all lengths, Glock 36/41; M&P 9/40/357 all lengths (not shield) and Walther PPQ/M2 all lengths.