Abstract: The present invention relates generally to a sliding square that can be slipped over a standard retractable tape measure that is extendable perpendicularly to abutment wall allowing 0-90 degrees angle lines to be scribed at measured distances from the end of a work piece. Sliding Square also may include a depth gage, bubble levels on the x and y planes, a protractor scale along with linear dimensions along its right angle straight edge side and standard rafter pitch angles to be defined. Abutment wall t's into base 32 extending equally above and below base so that it functions right side up from the left side of a work piece or flipped over from the right side.

Abstract: This invention relates generally to a pneumatic, hydraulic or other media driver, rotating-reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi where the boost pump is integral to and rotates with the clamp cylinder assembly.