Information From WEKOIL Pencil Sharpener Metal Blade Carpenter Pencil Sharpener Jumbo Crayon Sharpener,Hand held Sharpener,Woodworker Sharpeners 4-Pack The quality of a sharpener, especially the blade, plays a key role in optimum sharpening of wood-clad pencils. Due to their robust and hard leads, graphite pencils can be sharpened to a very thin point.Given their softer leads, colour pencils are sharpened to a shorter and blunter point. For optimum sharpening, Here suggest replacing the sharpener now and then because the sharpener blade will become blunt over time.This results in more tip breakages. Material: High-grade Steel+ABS. Size:17 mm hole. Application: Ideally for sharpening carpenter pencils, finish pencils ,lumber crayons,jumbo size crayons,etc,to be widely used for carpenter/woodworker,artist,designers,etc. Package:4 PCs of Metal Blade Carpenter Pencil Sharpener Jumbo Crayon Sharpener