Masonry Drill Set Material : carbon steel ,YG-8 alloy tip package : Plastic box YG-8 Alloy Tip Finish: Satin, Chrome Plated.5pcs A: 4, 5, 6, 7, 8mm 5pcs B: 4, 5, 6, 8, 10mm 8pcs A: 3, 4, 5, 6, 7, 8, 9, 10mm8pcs B: 4, 5, 5.5, 6, 7, 8, 9, 10mmMasonry Drill Set Masonry Drill Set