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EZARC Tools via Amazon [amazon.com] has 15-Piece EZARC Countersink Drill Bit & Plug Cutter Set w/ Depth Stop Rings, Extension Shaft & Storage Box on sale for $27.97 – 50% off when you apply promo code ZAVLAJHV at checkout = $13.98. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, try refreshing the page, re-entering the code, or checking after you select a payment method to confirm whether it already applied.