Brush Review. The MAC 221 Mini Tapered Blending Brush. It's described in the MAC website as a shadow-blending brush used for application and blending of powders. I've vacillated between getting this brush and a flat shader brush because I thought it might be redundant with my 224. It isn't. It applies shadows in a more precise and targeted manner than my 224. Simply, the track of color it leaves behind is thinner and smaller so if you want to do more detailed work, this is a must-have. This is also velvety soft. No scratchiness at all, unlike the 224. The way I use this brush, I apply my crease color, which is usually dark or medium brown, blend it out a little using a window wiping motion. After, I use my 224 to apply my transition color, usually a light brown or tan, at the top part of my crease and blend that out a little as well using the same side to side motion. I gotta say, this is one of my best brush purchases due to the uniqueness of its utility and how gosh-darn soft it is. Good news, this was a limited edition brush but is now permanent. Bad news, during my vacillating period, I've noticed that MAC stores only have 1 or 2 of this brush in stock so if this becomes more popular it might be difficult to find.