ITEM NAME:8pcs SDS PLUS Electric Hammer Drill Bits for Masonry Concrete Rock Stone T ANW.Uses: Dedicated To Shovel Walls, And Suitable For Drilling Of Ordinary Stones, Concrete, Brick Walls, Etc. Material: YG8C Alloy, 40Cr Steel. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.