Kolvoii 52-Piece Large SAE Tap and Die Set, 1/4"-20 to 1"-14 Coarse/Fine

Key features

• Large-Size SAE Thread Coverage: 52-piece SAE tap and die set covering 1/4"-20 to 1"-14 in coarse and fine threads. Designed for cutting new threads, repairing stripped holes, and restoring large bolts in vehicles and machinery
• Industrial-Grade GCr15 Bearing Steel (60 HRC): Heat-treated GCr15 steel delivers high wear resistance and torque strength. Maintains cutting accuracy under load without deformation, even during repeated rethreading tasks
• Precision CNC-Machined Cutting Teeth: CNC-machined taps and dies produce clean, accurate internal and external threads on steel, stainless steel, aluminum, brass, copper, and cast iron while reducing friction and cross-threading
• SAE Thread Pitch Gauge & Spiral Extractors: Includes an SAE pitch gauge for fast and accurate thread identification. Spiral flute extractors help remove broken bolts or studs without damaging surrounding threads
• Adjustable Tap & Die Wrenches for Control:Adjustable tap and die wrenches provide secure locking, precise alignment, and steady pressure across multiple sizes. Supports straight starts, stable engagement, and consistent threading under heavy load
• Complete Accessory Kit:20 taps, 20 dies, a tap wrench, die wrench with adapter, T-handle wrench, adjustable tap wrench, spring-flute extractors (3–18 mm), a flat screwdriver, center punch, and a SAE pitch gauge—all neatly stored in a durable blow-molded case
• Built for Heavy Equipment & Industrial Repairs: Designed to restore large stripped threads on trucks, farm equipment, engines, structural hardware, and heavy machinery—trusted by mechanics, technicians, and serious DIY users

Free shipping included. 30-day hassle-free returns.