Leaf Audio Knurled Nut Tool Pro. A professional-grade tool designed for fast and precise installation of M6 knurled and slotted nuts commonly found on Thonkiconn and similar audio jacks in Eurorack systems. Built for durability and ease of use, this vinyl-bodied tool includes a 4mm hex bit compatible with standard handles, making it ideal for frequent use in DIY and small-scale production environments. Features: Optimized for Eurorack Connectors: Designed specifically for M6 knurled and smooth slotted nuts like Thonkiconn. Pro-Grade Handling: Comes with a 4mm hex bit for use with standard hardware handles (not included). Durable Steel Pins: Equipped with 2 hardened steel pins and 6 replacements for long-term use. Two Pin Positions: Includes 6 holes for alternate pin placement—extend the tool’s lifespan easily. Hand-Use Only: Built for manual operation—using with power tools is not recommended.