Split rolls Sandpaper

These work great in Chris Wood's, Wood Wacker.  We prefer the 1/4" for this.

The 1/8" works great in the refillable Sand-O-Flex refill by Christoph Reiner.  

Each roll is 10' long and 4" wide.  Easily tears to the width you need.  For both of those applications you separate into 4 strips.