Diablo 4" x 7" SDS-Max Carbide Tipped Core Bit DMAMXCC5050 MSSC-KW Kneewall Connector and is a washer required

and is a washer required

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Diablo 4" x 7" SDS-Max Carbide Tipped Core Bit DMAMXCC5050 MSSC-KW Kneewall Connector and is a washer requiredDiameter: 4" Length: 12" Shank: SDS Max Working Length: 7" Tools: SDS Max Rotary Hammer Drill Materials: Concrete Diablo's SDS Max Carbide Tipped Core Bit range provides one of the fastest and longest lasting coring solutions on the market for concrete applications. All in one design strengthens the bit from end to end in order to withstand the stress and impact of high powered hammer drills in concrete. A spiral flute design removes dust faster,