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The Milwaukee Electric Tool Corp 48-20-7451 is a 44 Magnum SDS carbide drill bit engineered for use with SDS rotary hammers. Measuring 3/8 inch in diameter with a 4-inch drilling depth and 6-inch overall length, this bit is built for tradespeople drilling into concrete, masonry, and similar hard substrates. The four-flute design and unique tip geometry work together to deliver up to 25% longer drilling life compared to standard configurations, while also enabling faster cutting speeds. Electricians, plumbers, and general contractors reaching for an SDS rotary hammer will find this bit suited to everyday core drilling and anchor hole applications.
This bit is designed for use with any SDS rotary hammer, making it broadly compatible across job site conditions. It fits standard residential and commercial drilling tasks where concrete and masonry penetration is required. The centering geometry reduces bit walk at the start of a hole, which is especially useful when drilling in tight or awkward positions. Its four-flute construction distributes load evenly, reducing vibration transferred to the operator during extended drilling sessions.
Designed for use with any SDS rotary hammer, suitable for drilling into concrete, block, and masonry in residential and commercial applications.
Installation and use of this bit should be performed by a qualified tradesperson familiar with SDS rotary hammer operation. Always power down and disconnect the tool before changing bits. Inspect the bit for cracks or carbide damage before each use, and never use a damaged bit. Follow applicable OSHA and job site safety requirements when drilling into structural concrete or masonry.
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