Keyhole Hangers (Mini) Picture Hanging Kit holds up to 100LBS In stud.
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25x16mm Silver Metal Round Type Keyhole Shelf Brackets Hangers for Picture Frame Hanging with Some Screws, Pack of 30 : Amazon.ca: Tools & Home Improvement
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TILIYHELLO Keyhole Hangers ,heavy Duty,pack Of 10 With Screws | Walmart Canada