SATA GL34509 3/4" Drive 6 Point Impact Socket 21mm

A 6‑point design grips the flats of the fastener more securely than a 12‑point, reducing rounding and slipping under high torque. This improves torque transfer, minimizes fastener damage, and extends tool life in demanding work.

Drive size: 3/4 inch (21mm fastener). Material: Chrome molybdenum steel (Cr‑Mo). Finish: Black oxide coating for corrosion resistance. Design: 6‑point with off‑corner loading to reduce rounding and improve torque transfer. Suitable for high‑torque, impact wrench use.

Off‑corner loading minimizes edge contact with fasteners, reducing rounding and wear. It also distributes impact forces more evenly, enhancing durability during repetitive impacts and high‑torque tasks.

Ideal for automotive repair, heavy machinery maintenance, and industrial service where 21mm fasteners are common and high torque is required, such as suspension work, engine servicing, and large equipment assemblies.

Pair it with a compatible 3/4 inch drive impact wrench. Ensure the socket is fully seated on the fastener before applying torque, start with moderate pulse, and avoid hammering or striking the socket against fasteners. Use the correct size to prevent slipping and damage.

Keep it clean and dry after use, store in its case or a protective organizer, and inspect for cracks or wear before reuse. Wipe away oil or debris that can cause corrosion and ensure it’s kept away from moisture to preserve the black oxide finish.

Wear eye protection and gloves, verify the fastener size is correct (21mm) before torqueing, and avoid using damaged or chipped sockets. Do not exceed recommended torque, and ensure the tool and socket are properly aligned to prevent slippage.

For comparison on Fepy.com, consider these alternatives: - SATA GL34507 1/2\" Drive 6 Point Impact Socket 21mm: https://fepy.com/product/sata-gl34507-1-2-drive-6-point-impact-socket-21mm - SATA GL34510 3/4\" Drive 6 Point Impact Socket 22mm: https://fepy.com/product/sata-gl34510-3-4-drive-6-point-impact-socket-22mm These offer different drive sizes or slightly different fastener tolerances while maintaining 6‑point, Cr‑Mo construction and impact readiness.

This socket is specifically sized for 21mm fasteners. Using it on a non‑matching size can lead to rounding, slippage, or damage to the fastener and socket. For other sizes, choose the corresponding 21mm family socket in the correct drive size.

Yes: ensure proper seating on the fastener before applying torque, use the correct drive size for your tool (3/4" in this case), avoid side loading or bending the socket, and keep the wrench and socket clean and dry to prevent slippage. Periodically inspect the socket for cracks or deformation.

Yes. It is designed for 3/4 inch drive impact wrenches and should work with standard 3/4 inch tooling available for automotive and industrial use, provided the fastener is 21mm and the torque requirements are within the socket’s design limits.