Makita B-66612 9" SDS‘MAX Rotary Hammer Core Bit Shank AdapterMakita B 66612 Makita SDS MAX Core Bits are part of a 2 piece core bit system that increases versatility and productivity. Core bits have larger diameters than standard carbide bits, allowing smaller hammers to drill larger holes. Key Features APPLICATIONS : Fits Makita 2 piece rotary hammer core bits sizes 1 3 4" 6" VERSATILITY : Shank for Versatile 2 Piece Core Bit System PRODUCTIVITY : Core bits have larger diameters than standard bits allowing