Number of Holes: NULL Adjustable hole diameter: No Erase Function: No With tank: Yes Interchangeable Blade: No Sharpness indicator: No Body material sharpener: plastic Including lid: No Lefthanders Recommended: No Even to thick pencil: Yes Shape: unique Shock-resistant casing: Yes Battery powered: No Biodegradable: No Recycled Materials: No Eco-friendly Production: No