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The IRWIN IR61124 is a carbide tipped rotary drill bit from the Economy 611 series, designed for use with standard rotary drilling applications in trade and light industrial environments. The bit features a 7/16 inch cutting diameter and a 4 inch overall length, with a reduced 1/4 inch shank diameter that allows compatibility with a wide range of chucks and drivers. Licensed tradespeople and general contractors reach for this bit when standard high-speed steel is not sufficient for the material at hand. The carbide tipped construction extends service life compared to uncoated steel bits.
This bit is suited for residential and commercial drilling tasks where a reduced shank rotary bit is required. The 1/4 inch shank makes it compatible with quick-change chuck systems and standard 3/8 inch chuck drivers. It is sold individually and packaged as a carded single unit, making it practical for jobsite procurement or replacement of a worn bit without purchasing a full set.
Designed as an OEM-style replacement rotary drill bit compatible with standard 3/8 inch hole diameter chuck systems accepting a 1/4 inch reduced shank.
Install into a compatible rotary drill or driver with a chuck rated for 1/4 inch shank bits. Ensure the chuck is fully tightened before operation and the drill is set to the appropriate rotation mode for rotary drilling. Do not use in hammer or percussion mode unless the tool and bit are both rated for that application. Follow applicable jobsite safety codes when drilling near electrical conduit, plumbing, or structural members.
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