Feature: 1. OF SHARPNESS WITHOUT BREAK: Carbide forging after high temperature quenching, bring of sharpness edge, not easy to break when cutting, very durable 2. HIGH HARDNESS AND FAST DRILLING SPEED: Carbide head inserts have the characteristics of high hardness, strong impact resistance, and fast drilling speed 3. FIRM WELDING: Using high frequency welding technology, the welding opening is very firm, the inner and outer welding ports are smooth, and the appearance of the joint is accurate 4. WIDE USES: This cement brick electric hammer drill is widely used for cutting clean holes in concrete, brick work, drilling wall, stones, installing airconditioners, etc. 5. FOR MASONRY BRICK BLOCK REMOVAL: This thin wall core bit can achieve core removal of masonry, brick, and block, useful and practical Specification: Item Type: Thin Wall Core Bit Material: Carbide Color: Silver Specifications: Approx. 68mm / 2.68in Wide Application: Widely used for cutting clean holes in concrete, brick work, drilling wall, stones, installing air conditioners, etc. . Package List: 1 x Thin Wall Core Bit