Woodstock W1124 2-1/4-Inch by 1-1/4-Inch Rub Collar Bore
Freud 63-162 1/4-Inch Slot Cutter Set 9/16-Inch Depth, 1/2-Inch Shank
Lehigh 7423-6 7/16-Inch by 4-3/4-Inch 540-Pound Stainless Steel Quick Link
DEWALT DW1803 Heavy Duty 7/16-Inch Shank Quick Change Mandrel (Fits Hole Saws 1-1/4-Inch - 6-Inch)