When you want to zero gap a normal pair of trimmers (bridging the 2 blades together so there is "no gap" in between the 2) you have to unscrew the blade and manually adjust it. The adjustable blade on the Bevel is simply to eliminate the process of unscrewing the blades, it isnt for fading.the question, why the adjustable blade on the Bevels? Are they for beard trimming or can you fade with these?