The product is easy to use</br>The product is durable</br>The product is manufactured in United States</br>Ice HardenedTM cryogenically treated for up to 50% longer life</br>Optimized tooth form for up to 2X faster cutting</br>Wide?? angled & offset slots for easy plug access</br>Bi-metal construction with 8% cobalt for increased wear resistance</br>Includes: (5) Hole Saws??(1)Twist-Release Arbor with Pilot Bit?? (1) Additional Pilot Bit: 49-56-8010?? (1) 1/8" Key?? (1) Adapter: 49-56-6560.</br></br>Product Description</br></br>9-PC GENERAL PURPOSE HOLE DOZER HOLE SAW KIT. The product is easy to use. The product is durable. The product is manufactured in United States.</br><br/>http://www.amazon.com/gp/product/B0045CWX6Saand