TEKTON 3/8-Inch Drive Triple Square Impact Bit Socket Set – 8-Piece (M4-M12), S2 Steel Bits, CR-V Socket, With Socket Rail, For Impact Wrenches | SIB91104

About This Product

TEKTON did something smart with these triple square impact bit sockets.

Instead of making them one-piece, they use a two-piece design where the bit and socket are optimized separately—different steel alloys, different heat treatments, and different forming processes.

The result is a tool that's way tougher and longer-lasting than the usual one-piece stuff.

The bits are pressed permanently into the sockets, so they're not going to loosen up on you over time.

The sockets are made from 6140 chromium-vanadium steel, heat-treated to 40-47 HRC, and coated with manganese phosphate to fight off rust.

The bits?

They're S2 steel, heat-treated to a harder 58-62 HRC, so they keep their shape even when you're really cranking on them.
This set covers M4 through M12—eight sockets total—and comes with an 8-inch twist-to-lock socket rail that keeps everything organized.

One cool detail: the drive end has smooth walls (no detent grooves) so it plays nice with friction ring anvils, and there's a detent pin hole on one side for detent pin styles too.

So it works with pretty much any impact wrench out there.
Size markings are both laser-etched and stamped, so they won't fade away.
Solid, professional-grade set.