Dremel 9904 Tungsten Carbide Cutter
- Use on Hardened steel, fired ceramics and other hard materials.
- Do not use for drilling or enlarging holes less than twice the diameter of the cutter to avoid carbide surface catching side of hole and breaking.
- For best results insert bit in tool and back out slightly before tightening down to provide plenty of shank for the collect or chuck to hold the bit.