DuraDrive 1/4 in. x 3-3/4 in. Blue Ruspert Coated Hex Washer Head Slot Drive Concrete Screw (50-Pack) has an improved thread design that allows it to anchor sturdily into concrete, brick and block. Using the correct bit (that is included), drill hole in masonry to depth of at least 1/4 in. deeper than installed screw.
| Head Type | Slotted Hex Washer |
| Head Size | 5/16 in. |
| Colour | Blue Ruspert |
| Screw Size | 1/4 in. x 3-3/4 in. |
| Bit Size | 3/16 in. x 4-1/2 in. |
| Quantity per Jug | 50 |
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