Abstract: An adjustable support assembly for at least one power tool for moveable and stationary assembly for engagement with a ladder in which the ladder has two parallel rails with a width therebetween, each such rail having an upper, lower and outer portion. The adjustable support assembly has a platform for moveable engagement with the ladder, a slideable assembly for movement upon the platform, and an engagement device for engagement of at least one power tool on the platform. The platform is expandable through an interconnected structure between the sides of the platform to accommodate varying widths of the ladder. The width of the ladder is between 12 and 18 inches, and preferably 13 and ¾ inches. A clamp or screwable engagement is also provided to affix the assembly to the ladder at a determined location for use of the power tools. The engagement device has a plurality of wheels for movement upon the each of the upper, lower and outer portions of the rails.