3-Second Color Identification System: Instant Standard Recognition, Silver=UNC (5/8"-11 to 1/4"-20), Black=UNF (5/8"-18 to 1/4"-28), Gold=Metric (M6-1.0 to M14-1.5)
Industrial 40CR Carbon Steel Construction: High-carbon steel tools are heat-treated to a hardness of 58 HRC - rust and wear-resistant for longer tool life than ordinary repair kits
Organization Case: Impact-Resistant Toolbox with Custom Molded Slots - Securely Holds 61 Tools in 3 Color-Coded Zones (UNC/UNF/Metric)
Dual Standard Compatibility: Repairs SAE & Metric Threads in One Kit. From 5/8"-18 Automotive Bolts to M14-1.5 Hydraulic Fittings - No Additional Tools Needed