CMT 310.040.21 Dowel Drill 4 x 20 x 57.5mm RH Holdowns and Tension Ties connecting the two horizontal joist

connecting the two horizontal joist members to the vertical post at a 90 deg

making it appropriate for use in regions with elevated seismic or wind design requirements

What is the significance of the self-jigging feature on the HD7B

The built-in 1-inch standoff design helps prevent rot at the end of the post by keeping the wood elevated and away from direct contact with the concrete surface

making the fasteners virtually invisible once the boards are installed

CMT 310.040.21 Dowel Drill 4 x 20 x 57.5mm RH Holdowns and Tension Ties connecting the two horizontal joistThe CMT 310. 040 is a 4 diameter 2 Flute Dowel Drill (Short Series (57. 5mm)). Two flute design for blind hole drilling in solid wood, chipboard, MDF, plastics, and laminates. PTFE coating prevents pitch and adhesive buildup. Rotation: Right hand (RH). SPECIFICATIONS Product Type 2 Flute Dowel Drill Series Short Series (57. 5mm) Nominal Diameter 4 Cutting Length 20mm Overall Length 57. 5mm Shank 10mm parallel shank with driving flat Number of Flutes 2