This light holder slides onto any tactical rail, and has a 'tooth' to click into place. Light Holder _03, is a loose fit so it is easy to remove, relying on that tooth to stay on. Light Holder _4 is a tight fit, relying on friction to stay in place. There are already a few accessories like this about, but I feel this one fits the particular torches I purchased best. It can take quite a bit of force to click the torch in, and the torch does not slide back and forth at all. The torches were in the bargain bin on clearance at on Officeworks in Australia.Blender. Blender tends to mix up the normal if you don't pay attention. If you have time to learn any program, avoid blender as it's inaccurate and fickle.