Abstract: A riser lock unit is provided for quick and easy mounting onto an elevated sprinkler riser. The riser lock unit functions to retain or maintain the sprinkler riser in an elevated position, without normal spring-loaded retraction into an underlying sprinkler housing, to facilitate service and/or replacement of a sprinkler nozzle head mounted at the upper end of the riser. When desired, the riser lock unit is quickly and easily removed from the sprinkler riser.

Abstract: A riser lock unit is provided for quick and easy mounting onto an elevated sprinkler riser. The riser lock unit functions to retain or maintain the sprinkler riser in an elevated position, without normal spring-loaded retraction into an underlying sprinkler housing, to facilitate service and/or replacement of a sprinkler nozzle head mounted at the upper end of the riser. When desired, the riser lock unit is quickly and easily removed from the sprinkler riser.

Abstract: A sander device is provided for sanding an outside corner of a structure, such as a building wall or a furniture item or the like, defined by a pair of angularly oriented surfaces. The sander device comprises a mounting bracket defining a pair of support plates oriented at a selected angle, e.g., a right angle, relative to each other, and wherein the support plates are adapted to receive and support sandpaper sheets at the selected angle. The mounting bracket with sandpaper sheets mounted thereon is removably mounted onto a base which includes a handgrip to facilitate manipulation of the sander device relative to a corner structure to be sanded.