The Sonic 202-PC upgrade set will transform your 263-PC Intermediate Toolset into a complete 454-PC Advanced toolset. Our Aviation A&P Solutions are designed and manufactured by Sonic Tools to fill the missing piece for aviation technicians and students who are starting their journey as A&P technicians. We created comprehensive solutions with direction from aviation industry experts. Our solutions are perfect for anyone working on aircraft. They are also a great foundation for every rising and experienced A&P technician to perform efficiently. Metric and SAE tools are included in this set. This set comes standard with a serialized tool ID laser etched on each tool. Custom etching is available for added cost.