RAM-PRO Honing Guide for Chisel Edge Sharpening - Planer Blade Jig Don't replace expensive chisels and planer irons - extend their lives with new perfect edge Unique patented vice design fits planer irons 1-3/8" to 3-1/8", chisel blades to 1-7/8" Size-adjust screw plus twin chrome slides, vice jaws keep blade perpendicular to honing stone Move guide up/down on blade to increase/decrease angle; ball-bearing roller wheel, simple to use Get better-than-factory cutting edge for improved woodworking results - with less effort