Sidewalk bolts have a wide, low profile head and are often used in hurricane shutter installation. Slotted drive has a simple slot for a flat bladed screw driver.
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Sidewalk bolts have a wide, low profile head and are often used in hurricane shutter installation. Combination drive can be used with either a flat bladed or Phillips screw driver.
Screws with machine threads for use with a nut or in a tapped hole.
Screws with an Allen wrench drive.