The UltiTuck clip is a 3-n-1 feature tactical mounting clip that sports a versatile 2-hole mounting design. This clip will easily replace many standard 2-hole holster clips, and are very popular with users who like beltless carry with adjustable cant in a tuckable design. These operate on the "pinch" principal and are very sturdy and secure when engaged. All you need to do is pick your position on your waistline (or belt) and engage the locking lever to secure the clip in position. Once engaged and locked down, your holster will not move easily. These are very simple and effective to use.