These 7075 series aluminum pedal plates save over 20 grams of rotational weight from Speedplay X-Series pedals, and over 22 grams from their Zero pedals. These heat-treated and hardened aerospace grade inserts replace the heavier stainless inserts that are supplied with all X series and Zero pedals. Anodized to US Military specifications. Four inserts are included, enough for a pair of pedals. Proudly made in the USA.