ULTiM-8 Chalker is a uniquely original and innovative design. It is the only personal chalk holder of it's kind…PERIOD! Never before has anything like it been conceived. Machined from a solid block of lightweight 6061 aluminum it has nickel, dime and penny radius shapers machined into its surface and hard anodized for durability. This is the only tool available anywhere that offers a penny radius shaper. The machined “diamond” teeth will stay sharp for years and years. Also incorporated into this tool are nearly 100 steel needles for perforating and aerating even the hardest leather tips. Possibly the best feature of any chalker out there are the unique cut outs that allow you to easily remove the worn out piece of chalk...No more digging or breaking the old chalk to remove it!!