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FENFANG SHOP via Amazon [amazon.com] has for Prime Members: EVERPLUS Home Security Door Reinforcement Lock for Inward Swinging Doors on sale for $9.99 – $3.00 off when you apply promo code UK2C3I2A at checkout = $6.99. Shipping is free.

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.