For T-slots in wood and panel material.
The T-Slot Cutters from Sistemi Klein are made of tungsten carbide tipped (TCT) steel.
The cutters of the router bit nr. 361390 are dimensioned to cut a slot sized to allow a bolt with a 1/4 inch coarse-threaded shaft and a hexagonal head to slide freely. You can then use the INCRA Build-It Brackets, Nuts, and Clamps
not only in the various INCRA tracks and jigs, but also in T-grooves cut directly in a worktop or other custom jigs and materials.
You can also use 6 mm bolts but not with a hexagonal head (the standard head is too small) in these slots. A square head nut
will fit exactly in the T-slot, however.