This is a 41mm impact deep socket with a 3/4in square drive, designed to access recessed or long-stud fasteners where extra reach is required. Its primary use is with 3/4in drive impact wrenches and breaker bars for the removal and tightening of large hex-headed nuts and bolts in heavy-duty maintenance and repair tasks.

The socket is manufactured from chrome–molybdenum (Cr–Mo) alloy steel that has been heat treated for improved toughness and shock resistance, making it suitable for repeated impact loading. The head profile is a 6‑point (hex) design to maximise contact on hex flats and reduce rounding of fasteners; the drive interface is a 3/4in square recess compatible with standard 3/4in impact tools and sockets, with a spring‑ball detent hole for positive retention. The surface is finished in black phosphate/oxide to resist corrosion and to distinguish it from chrome‑plated hand sockets; as an impact tool it is not chrome plated. The socket is produced to common DIN/ISO/BS dimensional and drive compatibility standards for hand sockets so it will mate correctly with other standard 3/4in tools and extensions.

Typical applications include heavy vehicle and truck workshop work, agricultural machinery maintenance, construction plant servicing, industrial assembly and heavy engineering where high torque and impact tools are used. It is particularly useful for loosening seized or heavily torqued wheel nuts, axle and suspension fasteners, and any situation where the extra depth is needed to clear studs or splined ends.

Key benefits of this 41mm impact deep socket are the enhanced toughness of Cr–Mo material under shock loading, the 6‑point geometry which reduces slippage and fastener damage, and the deep profile which provides extra reach. The black phosphate finish offers practical corrosion resistance for workshop use, and the standard 3/4in drive ensures broad compatibility with commercial impact wrenches and accessories.

Duchy Fasteners stocks this 41mm 3/4in impact deep socket individually and as part of larger 3/4in drive impact socket sets; a comprehensive range of sizes and pack options is held for commercial and trade customers.