Here is a good blow gun for blowing out wheel bores and such. It does have interchangeable tips sold separately. This is what I use, but with a rubber tip. You can control the amount of air flow too, which is real handy.
Description:
• The Cyclone™ F1 features an Xtreme-Flo™ nozzle which is capable of moving large volumes of debris. It increases the velocity and volume of air exiting the nozzle boosting the available thrust up to 250% by drawing ambient air through two side ports. In case a deadhead occurs with the nozzle, air will exit the two side ports satisfying OSHA safety standards.
• Meets OSHA Standards
• Durable Cast Aluminum Body
• High Volume Nozzle
• Ergonomic Comfort Grip

Description:
• The Cyclone™ F1 features an Xtreme-Flo™ nozzle which is capable of moving large volumes of debris. It increases the velocity and volume of air exiting the nozzle boosting the available thrust up to 250% by drawing ambient air through two side ports. In case a deadhead occurs with the nozzle, air will exit the two side ports satisfying OSHA safety standards.
• Meets OSHA Standards
• Durable Cast Aluminum Body
• High Volume Nozzle
• Ergonomic Comfort Grip