This Jig allows you to easily drill holes in chair seat blanks for leg, arm post and spindle mortises. You can see it in action on my YouTube channel https://www.youtube.com/channel/UCYRF9Rtxrkvx175G5KRy2Jg, or my IG feed/IGTV at "barton.kyle".
The basic Kit includes the following:
Barton Boring Jig
Set-Up Block/Angle Gauge
Threaded Rod with 5 jam nuts
1/2" Drill extension shaft - 10" Long
1/2" Coupler - To connect the shaft to the 1/2" shank drill bits
1/2" Rod End Bearing
Please Note: This Jig also requires a drill capable of accepting 1/2" shank drill bits; and a 1/2" shank brad-point bits with a long center-spur to work correctly for acute angles (Trident Drill Bits). This Kit should work fine if you are already using these types of "chairmaking" bits with a 1/2" shank.