13/16" x 21" Simpson SDS-MAX Quad Head Concrete Drill Bit, Carbide Tip, Pkg 1 Decorative Gable Plates Its flexible design and precision-engineered

Its flexible design and precision-engineered construction make it ideal for a variety of roofing projects

Durable silicone construction: Resists extreme temperatures and UV rays

It is available in smooth and knurled versions for attaching building materials to concrete and steel

After the anchor reaches the bottom of the drilled hole

13/16" x 21" Simpson SDS-MAX Quad Head Concrete Drill Bit, Carbide Tip, Pkg 1 Decorative Gable Plates Its flexible design and precision-engineeredStrong Tie SDS MAX masonry drill bits feature a durable carbide tip and are designed for use in concrete, brick and block applications. California Residents: WARNING