Awesome sheath!!! I appendix carry this sheath and knife for work. It’s fits perfectly and comfortably. I selected the UltiClip as an option. It fits securely the entire shift. The sheath is beautifully made. The knife clicks in place and fits in the sheath. I’m ready to order another one as a gift and possibly another for my EDC. Excellent work. I also order a off duty gun holster for my Sig P320. I will follow-up with a review when I get it. As for now I highly recommend the TDI sheath.