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The STEWART FASTENER CM9538X4X6 is an SDS drill bit designed for use with SDS-chuck rotary hammer drills. It measures 3/8 inch in diameter with a 4-inch usable flute length and a 6-inch overall length. SDS bits transfer rotary and hammering force directly to the bit, making them the standard choice for drilling into concrete, block, and masonry. Licensed tradespeople in electrical, plumbing, HVAC, and general construction reach for SDS bits when anchor placement or conduit penetrations require clean, accurate holes in hard substrates.
This bit is suited for residential and light commercial applications where concrete or masonry penetrations are required. Typical scenarios include setting sleeve anchors, drop-in anchors, or wedge anchors in concrete slabs and block walls, as well as drilling through masonry for pipe and conduit runs. The 3/8-inch diameter is a common anchor-hole size across mechanical and electrical trades.
Designed for use with SDS-plus rotary hammer drills. No specific model compatibility data was provided in the product input.
Installation is performed by electricians, plumbers, HVAC technicians, and general contractors using SDS-plus rotary hammer drills. Ensure the bit is fully seated and locked in the chuck before drilling. Wear appropriate eye and hearing protection when operating rotary hammer equipment in masonry. Follow applicable OSHA and local safety codes for drilling operations near embedded conduit, rebar, or utilities.
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