The Tek-Lok model can be held stationary with 2 locking tabs. Fits belts 1-1/4" to 1-3/4" wide.
Tek-Lok is a belt loop that can be held stationary with two locking tabs. It may be removed from the belt by pressing the two locking tabs together. Accomodates belt widths from 1 1/4" to 2 1/4".
SRB is a more standard belt attachment. It is a wide kydex molded section, formed to hold the holster away from the belt, with a belt loop at each end. Accomodates belts up to 2 1/4" wide.