Abstract: The present disclosure describes a device for installing an upright support member in a particulate substrate is provided, comprising an elongated first member having proximal end and a distal end and a lumen therein of approximately constant cross-section, extending from said proximal end to said distal end, the full cross section of said lumen being open at said distal end; an elongated second member having proximal end and a distal end, the distal end slidably engageable under application of manual force in a lengthwise manner into the proximal end and within the lumen of the first member; and a third member, having a periphery, affixed to said distal end of the second member, and fitted around the periphery thereof to form a slidable seal with the lumen of the first member during insertion and withdrawal of the second member.