This thread features the making of an Inside the waistband holster.

This video from KnifeKits shows the making of a fold-over IWB Kydex holster for a Glock 19. Using a Master series Multi-Mold, this IWB holster turned out great. With molds for CZ, Sig Sauer, Smith & Wesson, and many more, this tutorial can be adapted to fit any custom holster project.

+ .080 Kydex Sheet Material (Flat Dark Earth Spring)
+ 8-9 eyelets (Black)
+ IWB Flush Mount Attachment

Recommended Tools:
Vacuum Forming Press
Master Series Flaring Press
Master Series Multi Mold Prop
Drill Press (#8 Kydex Drill Bit)
Eyelet Flaring Dies: Master Series #8
Toaster Oven / (A heat gun or other type of heat source can be used)
Flat Iron
Buffing/Flap Wheels