Milwaukee 48-20-5079 11" Extension for L.H.S. SystemPart of Milwaukee's L.H.S. Concrete Drilling System Use with other L.H.S. components to drill deep holes Can be used with L.H.S. core bits, 4 cutter fluted bits, and turbo-tunnel bits Use with 48-20-5075 for Spline Shank Rotary Hammers 5311-6, 5312-6, 5316-6, 5317-6 5352-Use with 48-20-5077 adapter for SDS Max Rotary Hammers