Double sided site and workshop bench stone ideal for up to 3 inch plane irons and chisels unique clearance channel on coarse side to produce faster cleaner cut solid diamond surface on fine side grit size clearly marked on surface precision flatness substrate unique diamond shaped surface prevents snagging when sharpening small or pointed tooling complete with pouch cleaning block and non slip mat fine 1000 grit 15 micron and coarse 300 grit 50 micron guaranteed for five years recommended use wi