Diablo DSP2950-S12 Speed Demon Spade Bit Set BF15 4" round duct collar with

4" round duct collar with a plastic damper protects against backdrafts and ensure quiet operation

Max working load of 300 lbs

and UL924 listed to run 90 minutes

7-1/4" Dia

Size: 24"x 16"

Diablo DSP2950-S12 Speed Demon Spade Bit Set BF15 4" round duct collar withDiablo's Speed Demon spade bit range provides one of the fastest, most effortless hole drilling solutions on the market for fast, clean wood. Highlights: 12 Piece The high performance speed tip design self feeds for faster hole making when compared to traditional spade bits An optimized curved paddle design enhances the chip evacuation process for more holes per charge This range is impact strong for increased shank stability and durability in