Check the listing for details. Matco Tools 81MATDS 81 Piece Auto Master Tap & Die Set Rapid Select Ratchet New. Condition: Used. Listed at 414.62 USD. This is a genuine, professional-grade Matco Tools 81-Piece Auto Master Tap & Die Set (Part No. 81MATDS). Designed specifically for automotive technicians, this comprehensive master set includes automotive-specific sizes not found in traditional 75-piece sets. It features premium Japanese Aichi grade tool steel for extreme durability and the patented Rapid Select Ratchet system. Set Features: 81-Piece Comprehensive Kit: Includes specialized automotive sizes designed to handle tough shop tasks. Patented Rapid Select Ratchet: Quickly change between forward and reverse without working a switch or flipping the ratchet over. Japanese Aichi Grade Tool Steel: Imported alloy specifically hardened to remain razor-sharp while preventing brittle breaks under high torque.