This lecture covers the design principles for maximizing elasticity in flexures, focusing on factors such as clamping length, surface treatment, and surface finish selection. It also explores the need for nanometric positioning precision, applications in extreme environments, long lifetimes, and high efficiency systems. The lecture delves into new manufacturing technologies like Wire Electrical-Discharge-Machining and Silicon Etching, emphasizing advantages such as no contact friction, high efficiency, and monolithic design. Challenges such as limited stroke and support stiffness are discussed, along with analytical dimensioning tools and manufacturing considerations. Additionally, the lecture introduces the concept of Martin Grübler's Mobility in articulated structures.