The Renzetti Master Spare Parts Kit includes essential metal replacement components for maintaining peak performance of your Master Vise. This kit features a jaw adjusting screw and a rotary tension screw, both crafted from durable, corrosion-resistant materials to ensure long-lasting reliability and precise operation. Ideal for routine maintenance or minor repairs, these components help maintain smooth jaw action, accurate hook alignment, and consistent performance, allowing tiers to continue producing professional-quality flies.