This Forstner (drill) bit has a weird shank with two different diameters and a gap between them. Also note the hole at the end. Is this some kind of special shank system,
Best Impact-Rated Step Drill Bits: Milwaukee, Lenox, Dewalt, Diablo, or…?
Found these while cleaning the garage. What are they? Weird spade bits? : r/Tools
Drill Bit Types - The Ultimate Guide
20 Types of Drill Bits and How to Choose
20 Types of Drill Bits and How to Choose
Where to find Auger Bits and How to Sharpen Them | Hand Tool Woodworking How To - YouTube
Amazon.com: EFFICERE 8-Piece Premium 1/2” Reduced Shank Silver and Deming Large Drill Bit Set in Aluminum Carry Case, M2 High Speed Steel, 135-Degree Split Point | SAE Inch Size 9/16” - 1”
20 Types of Drill Bits and How to Choose
odd drill bit? - Tools, ID, and pictorial reference - I Forge Iron