Seat Drilling Guide Mk II

The Seat Drilling Guide Mk II allows you to easily drill holes in chair seat blanks for leg, arm post and spindle mortises.

You can see it in action on our YouTube channel: https://youtu.be/5BiI3kRUz6g

The Basic Kit includes the following:
Seat Drilling Guide
Set-Up Block/Angle Gauge
1/2" Standard Drill Extension - 10" Long

You can also upgrade to the 10" 12-Point Drill Extension. Very useful for reaming with the Guide. What sets this extension apart is the 1/4” 12-point bolt at the end of the drill extension. That provides increased torque and purchase, making it easier to ream with a socket adapter in your drill—especially useful for reaming in hardwood seat blanks. More importantly, it allows you to use a 1/4” socket wrench or box wrench for hand-reaming with Seat Drilling Guide, so you can sneak up on that perfect fit. You can see an overview of the 12-Point Drill Extension on our YouTube channel: https://youtu.be/7o35yGUFx60

Also, this Guide requires a drill capable of accepting 1/2" shank drill bits; and a 1/2" shank brad-point bit with a long center-brad to work correctly for acute angles. We sell these type of drill bits under our Trident Drill Bit line (link: https://bbcustomtools.com/listing/733888113/trident-drill-bit). This Guide should work fine if you are already using these types of "chairmaking" bits with a 1/2" shank.

Note: Either Drill Extension comes with a flat machined on one end of the shaft for the 1/2 coupler. Drill Bit is not included.