Quickly and Easily Adds a Sound Bore or Vent

• Works on silicone, vinyl or ADCO Mold
• Plunger removes the core that is cut from the earpiece
• Set of three core drills (one of each size below)
• Core drill for tubes, 0.120"/3.05mm
  Core drill for large bores, 0.148"/3.76mm
  Core drill for venting, 0.065"/1.65mm