Woodpeckers T-48 - 1/4in. T-Track - 48in. Woodpecker's version of 1/4in. T-Track has a number of nice features including a unique outside profile, a recessed channel for pan-head screws, and compatibility with standard 1/4in hardware. Its unique outside shape allows for a better fit in undersized grooves. The profile is slightly tapered being wider at the top then the bottom thus ensuring easy installation in saw cut dados which may not have crisp, square inside corners. Inside profile is compatible with standard 1/4-20 nuts and bolts as well as other accessories like a stop block, edge-clip and rectangular nuts. Woodpeckers 1/4in. T-Block, (#T14TSTOP) fits flush or slightly below the top of this track.This track is punched on 4in centers and includes #6 x 1/2in. Pan Head Screws, however longer screws or construction adhesive can also be used.