Square nose finish
It is used to create a smooth transition between a laminated floor and carpet or a sliding glass door. Square nose pieces may also be referred to as a baby threshold. Square Nose Reducers are very similar to Thresholds but have a more squared off edge.
A Square Nose typically used with floating floor, is perfect for putting hard surface floors up against vertical obstacles, where a Quarter Round or Wall Base would be difficult to use to cover an expansion gap (brick wall, fireplace, sliding glass door, etc.) .
The Square Nose overlaps the hardwood or laminate floor, hiding the expansion gap with the overlapped portion of the molding.
Installation of a Square Nose would involve using construction adhesive to glue the transition piece to the subfloor and/or face nailing the piece to the subfloor using 8 penny finish nails.