Simpson Strong-Tie #12 x 1-1/4" Self-Drilling Strong-Drive XM Metal Screw, Medium Hex-Washer Head - Quik Guard Coating, Qty. 2,000 Decorative T Straps and L Straps and the larger-diameter anchor holes

and the larger-diameter anchor holes are for 1/4"-diameter concrete screw anchors

SB anchor bolts are commonly used in residential and commercial construction where code-compliant concrete anchorage is required

If the load requires more capacity

The Simpson Strong-Tie® Deck-Drive™ DWP Wood Flat Head SS Screw is built for exterior projects that demand strength and durability

Type 316 stainless steel can be used with seaside applications and has superior corrosion resistance

Simpson Strong-Tie #12 x 1-1/4" Self-Drilling Strong-Drive XM Metal Screw, Medium Hex-Washer Head - Quik Guard Coating, Qty. 2,000 Decorative T Straps and L Straps and the larger-diameter anchor holesLoad testing and code listing of Strong Drive metal screws ensures reliable performance and maximum load values. Comparative testing proves that XM Medium Head Metal screws from Strong Drive are superior to various fastener types in 33 ksi and 50 ksi steel decking. Key Features 5 16" hex drive (replacement driver bit: BITHEXR516 R1) 1 2" diameter hex washer head is ideal for narrow channel steel decking Available only in 1 1 4" length with #5 drill