Premium Material: Made of carbide and YG8 tungsten tips, heat treated and tempered for sturdy and durable performance. Cut a Perfect Hole: Hardened tips combined with an optimized design provide smoother, faster cutting with minimal vibration. High Efficiency: Features two large chip openings on both sides of the wall cutter for efficient chip removal and enhanced drilling performance. Professional Core Drill Bit: Suitable for concrete, brick, masonry, wall drilling, stone, and air conditioning installation applications. Carbide Hole Saw: Constructed with a carbide body and YG8 tungsten tips. Improved tooth geometry enables faster cutting. Thicker, hardened tips increase durability. Positive and aggressive point angle for effective penetration. Compatible with SDS Plus shank. Includes 8 mm center masonry drill bit. Designed for use in hard materials such as brick, concrete, and cement block walls. Precautions: 1. The hole opener and connecting rod must be used together when drilling through walls. 2. Do not use hammer drill mode. After initial drilling, remove the center drill bit before continuing. 3. Not intended for load-bearing walls or walls containing steel reinforcement. 4. Not compatible with hammer drills or three-jaw chuck hand drills. 5. To maintain performance, periodically retract the bit during drilling to clear dust and debris.