Bit Extension, Length: 18", Hex Shank Size: 5/16" (79mm), Fits Arbors: 18-5/8 - 18-1, 45-5/8 - 45-13/16, 61PTS-5/8 - 61PTS-1, 66PT-3/8 - 66PT-9/16, 37154 & 38522
- Diameter: 21/32 in
- Type: Extension
- Diameter: 23/64 in
- Diameter: 5/16 in
- Length: 18 in
- Type: Power