https://www.acehardware.com/departments/hardware/screws-and-anchors/anchors/5305479
HILLMAN 5/16 in. D X 2-3/4 in. L Steel Round Head Strike Anchor 50 pc Mfr# 375656 - Ace Hardware
Strike Anchors are designed for concrete applications only. For installation, anchor is inserted into pilot hole, nail is struck and expands the anchor,...