CMT 362.100.12 Two Flute Dowel Drill 10 x 44 x 77mm LH CBSQ Column Base - Quick-Install 540 is a 2-1/8" Forstner

540 is a 2-1/8" Forstner Bit for drilling precise flat-bottom holes in softwood

350 is a (Blind Hole / Hinge Boring Bit)

The Simpson CPT88Z CPTZ ZMAX Galvanized Concealed Post Base for 8x8 by Simpson Strong-Tie is a high-performance post base engineered for 8x8 nominal posts and columns requiring a clean

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CMT 362.100.12 Two Flute Dowel Drill 10 x 44 x 77mm LH CBSQ Column Base - Quick-Install 540 is a 2-1/8" ForstnerThe CMT 362. 100 is a 10 diameter 2 Flute Dowel Drill (Long Series (77mm)). Extra long two flute dowel drill for deep blind hole drilling in thick panels. For solid wood, chipboard, MDF, plastics, and laminates. Rotation: Left hand (LH). SPECIFICATIONS Product Type 2 Flute Dowel Drill Series Long Series (77mm) Nominal Diameter 10 Cutting Length 44mm Overall Length 77mm Shank 10mm parallel shank with driving flat Number of Flutes 2 Blade Material