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The 4-21M Momento 21mm Magnetic Impact Socket, 1/2” Square Drive is designed for professional impact fastening applications where fastener retention is helpful during installation or removal. Built for use with compatible 1/2” square drive impact tools, this Momento magnetic impact socket is a practical choice for assembly, maintenance, repair, and industrial fastening work.

As part of Momento’s 1/2” magnetic impact socket range, this socket helps hold compatible fasteners in place while the user positions the tool. Magnetic impact sockets can be especially useful for overhead work, vertical fastening, repetitive assembly, or applications where dropped fasteners can slow down the job.

The 4-21M Momento 21mm Magnetic Impact Socket, 1/2” Square Drive is ideal for users who want the added convenience of fastener retention while maintaining compatibility with 1/2” square drive impact tooling. Its magnetic design supports easier handling in fastening applications where alignment, placement, and control matter.

Choose Momento 1/2” magnetic impact sockets when you need impact-rated sockets that help retain fasteners during use. The 4-21M Momento 21mm Magnetic Impact Socket, 1/2” Square Drive combines professional socket utility with added convenience for demanding fastening environments.