Drawbore Pin Pair

Drawboring is a great way to make a strong mechanical joint. A wooden pin is hammered through slightly offset holes in the two pieces, and pulls the joint together. You use Drawbore Pins to pull the joint together first (with some force and a twisting motion). This eases the edges of the hole making driving the wood pin easier. You can also disassemble the joint if you want to work on the fit some more before permanent assembly.

O-1 Tool Steel, Rockwell 60-62. Diameter at base of pin .440" (1.12cm) tapering to .110" (2.8mm) at the tip.  Lenth overall 12".  Sold in pairs. To pre-assemble the four parts of a door frame, two pair are handy.

Watch Chris Schwarz demonstrate the use of Drawbore Pins:
Drawbore Pins Part 1 - Theory and Preparation.
Drawbore Pins Part 2 - Execution..