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© Top-Quality T K Drilling Drywall Anchors Assortment
10 Review
372Pcs Leanking #8 Self Drilling Drywall Anchors Assortment Kit - 7 Variety Heavy Duty Plastic Anchors & 2 Kinds Of Self-Drilling Gypsum Wall Board Anchor Screws
16 Review
ποΈ Hollow Cavity Plasterboard by Anndason
9 Review
π© SnapSkru Glass Filled Fastener by TOGGLER
10 Review
Premium Eapele 4X4 Wood Fence πͺ΅ Post Anchor Base: Secure Your Fence with Ease
8 Review
π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review