Abstract: An accessory for a working device can include a plug body, an extension portion, and a tool. The plug body can have a length along a first axis and can be comprised of a keyed connection piece on a first end. The extension portion can connect on one end to a second end of the plug body and on an opposite end to the tool. The plug body can be receivable by a plug receptacle on a receiving adapter or a working device. The accessory can further include a spring-loaded locking mechanism that can be structured and configured to transiently lock the plug body to a receiving adapter or a working device.

Abstract: An adjustable support stand can include a front support on a first end of the adjustable support stand having a grip comprised of a first, front support material; and a rear support on an opposing, second end of the adjustable support stand having a grip comprised of a first, rear support material, wherein the front and the rear supports can each have at least two vertical arms, at least one of the supports can have vertically stacked chevron voids on each arm, and the chevron voids can be deformable by the object being worked upon to secure and grip the object in place.

Abstract: An external suspension system for supporting an inflatable air duct includes a series of external hangers that help hold the duct open while the duct is deflated. In some embodiments, the suspension system supports the duct at a series of points that are broadly distributed in a staggered pattern across the duct, yet the entire duct can be suspended from a single overhead cable, even if the duct is a stepped tube with multiple diameters. The system includes novel ways of locking the hangers to the duct and to the overhead cable.