Expansible sanding block exhibiting oblique extending surfaces

A sanding block for supporting an exteriorly mounted looped sanding belt, comprising:

• a substantially elongated and planar shaped base having a first end and a second end and establishing a bottom extending belt supporting surface;
• a substantially elongated and planar shaped cover exhibiting at least first and second oblique extending and belt supporting surfaces and having an overall length equivalent to said base, each of said base and cover further comprising interengaging surfaces upon which are defined a plurality of mating tabs and slots and by which, upon engagement, collectively define a three-dimensional article for supporting thereupon the looped sanding belt;
• and
• a trigger exhibiting a substantially three-dimensional rectangular shape and extending laterally across a widthwise defined opening in said base in communicating fashion with an end surface associated with said cover, such that said trigger is positioned between said base and cover, said trigger being displaced in a first lateral direction to lengthwise displace said cover away from said base, said trigger displacing in a second and opposite lateral direction to reverse displace said cover inwardly towards said base, wherein said trigger exhibits a rectangular shape and further comprises an elongate aperture defined along a side surface and within the trigger is defined a ramp surface, the base having a fixed end projection that projects inwardly of said aperture, said end projection traveling along said ramped surface, during lateral translation of said trigger, causing said trigger and slidably engaged cover to lengthwise translate in the selected displacing direction.