Sleeve anchor

Sleeve anchors, Zinc plated steel

Sleeve anchors, Zinc plated steel

Flat head sleeve anchor

Slotted flat head

Flat heads are countersunk (cone shaped under the head) with a flat top. Slotted drive has a simple slot for a flat bladed screw driver.

Hex head sleeve anchor

Hex head (w/ nuts & washers)

Hex heads are six sided for use with a wrench.