You need to drill a 1/4" hole, I tried 3/16 because I like a tighter fit but they really need 1 /4". They worked fine. My house is built with cinder block and angel brick finishes. I've used them to install shutters in my house and they worked better than other anchors I'd run out of.
π© Concrete Hanging Fasteners: Efficient Drywall Anchors
9 Review
π© Top-Quality T K Drilling Drywall Anchors Assortment
10 Review
Gaming computer chair AeroCool Guardian, upholstery: faux leather/textile, color: Champion Red
19 Review
π© SnapSkru Glass Filled Fastener by TOGGLER
10 Review
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review
π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review
POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
8 Review