- 330 mm SDS MAX extension with M22 thread, designed for deep and precise drilling - Includes 4-flute centering bit (8 x 110 mm) that ensures perfect centering and prevents slipping - Made of high-quality 45 steel, offers great stability and durability - Compatible with all rotary hammers with SDS MAX shank - The centering bit is securely fixed with an Allen screw - Includes combination wrench for easy assembly and accessory changes - Ideal for professionals and DIY enthusiasts seeking optimal results when drilling concrete, stone, and hard materials - Allows for clean, safe, and efficient drilling in all types of construction projects