Features: Project type: Engine cylinder honing replacement stone Replace the engine cylinder grinding stone. 3-piece packaging. Designed specifically for professional automotive mechanics and heavy-duty applications. The stone is firmly adhered to the aluminum bracket. The heavy-duty structure ensures durability.. Specifications: Material:45# Steel Galvanized Size:As Picture Color:As Picture Package Includes: 3Pcs xReplacement Stones Note: Please allow 1-3cm differences due to manual measurement. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you! No Retail Box,Packing Safely in Bubble Bag.