Self-Drilling Roofing Screws, Metal to Wood, Gray, 10 x 1.5-In., 1- Lb. Designed to fasten steel roofing to wood purlins used in post frame construction plywood or OSB used in residential construction. Produced with Dura-Seal coating with enhanced corrosion resistance over painted heads. 2.5 mils of powder with chromate sealer. Molded diecast zamac 3 zinc aluminum alloy provides lifetime protection against red rust on the head washer. Designed to fasten steel roofing to wood purlins used in post frame construction plywood or osb used in residential construction Produced with coating with enhanced corrosion resistance over painted heads 2.5 mils of powder with chromate sealer Molded diecast zamac 3 zinc aluminum alloy provides lifetime protection against red rust on the head washer Threads transition from fine to coarse to generate superior holding strength in various wood substrates Micro-bit point reduces metal shavings that can embed themselves in the rubber washer Starts fast finishes straight Pro-stick bit included. Specifications 1 lb Size: 10 x 1.5" Finish: Grey. Features Color: Grey Size: 10 x 1.5 in. Country of Origin: Taiwan Weight: 4.85 lbs Produced with the highest grade materials USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.