Bosch Core Bit Extension SDS Max Drive Shank Mandrel Adapter (Forged Alloy Steel Low Vibration Deep Foundation Concrete Brick Masonry Boring) Length (Inches):18 Inch As part of the world’s As part of the world’s largest 18V cordless system and thermal stress and a universal slotted SDS Max shank 20 mm) Tool Shank Interface Standard SDS Max Heavy Duty Slotted Universal Drive Core Bit Interface Standard Heavy Duty Direct Screw Threaded Core Adapter Mandrel Core Cutter Compatibility Bosch Heavy Duty SDS Max Rotary Hammer Core Bits Material Composition Heat Treated Structural Drop Forged Alloy Tool Steel Mechanical Coupling Style Direct Core Transmitting Monoblock Core Shank Operational Mode Setting Hammer & Rotation Combo Mode Only Power Tool Compatibility Corded & Cordless SDS Max Combination Rotary Hammers Measurement Standard Fractional Imperial (SAE) Standard Dimensions Product Condition Brand New OEM Original Packaging Suitable for material type Poured Concrete