Forstner bit extensions solve one of the major problems with forstner Bits -- their limited depth capacity. This extension fits WoodRiver forstner bits only that have 3/8" diameter shanks.



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Forstner bit extensions solve one of the major problems with forstner Bits -- their limited depth capacity. This extension fits WoodRiver forstner bits only that have 3/8" diameter shanks.





  • Designed for use with WoodRiver forstner bits only
  • Extension adds 10” to length of forstner bit
  • Socket accepts forstner bits with 3/8” diameter shanks
  • Forstner bit held in extension socket with two set screws - 3/8” diameter drive shank allows use of multiple extensions
  • WoodRiver is proudly made by Woodcraft, America’s leading supplier of high-quality woodworking hand tools, power tools, domestic and exotic wood, shop supplies, project plans and kits, plus so much more! Offering first-rate products for all your woodworking needs and designed to help you make wood work. Our family of brands include Woodcraft tools and supplies, Highpoint professional-grade fasteners and hardware, Pinnacle precision-engineered tools and Woodcraft Magazine.
  • Designed for use with WoodRiver forstner bits only
  • Extension adds 10” to length of forstner bit
  • Socket accepts forstner bits with 3/8” diameter shanks
  • Forstner bit held in extension socket with two set screws - 3/8” diameter drive shank allows use of multiple extensions
  • WoodRiver is proudly made by Woodcraft, America’s leading supplier of high-quality woodworking hand tools, power tools, domestic and exotic wood, shop supplies, project plans and kits, plus so much more! Offering first-rate products for all your woodworking needs and designed to help you make wood work. Our family of brands include Woodcraft tools and supplies, Highpoint professional-grade fasteners and hardware, Pinnacle precision-engineered tools and Woodcraft Magazine.

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