Foolproof Chisel and Plane Sharpening
Use spray adhesive to attach half sheets of silicone carbide sandpaper to the glass. Cover one side with 220- and 320-grit paper and the other side with 400- and 600-grit. The sharpening angle is determined by how far you extend the blade before clamping it to the guide. Dimensions on the side of the guide show where to set chisels and planes to maintain 25- and 30-degree angles.
Clamp the blade in the guide and roll it back and forth on the coarsest paper until the edge is uniformly shiny. It should take only 15 or 20 seconds. Repeat this process for each progressively finer grit.
When you need to extend the reach of your cordless screwdriver, just pull the shaft out of a four-way screwdriver and clamp it in the chuck.