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Self-Sticking Wall Patch
Available up to 8 in. square, these stiff metal patches eliminate the time-consuming process of squaring a hole, putting in wood backer boards, and buying, cutting and taping the drywall. They're a great fast fix for holes and big cracks in walls before painting. Buy wall patches on Amazon now.
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For mysterious, quantum-mechanical reasons, the screws that hold handles and doorknobs always eventually work loose. A few drops of thread-locking compound will permanently fix the problem, yet still allow you to remove the screw with ordinary tools if you need to later. A heavier duty variety is also available for large bolts and machinery. Order this product on Amazon now.