General description 3-piece set including a collet chuck head adapter and router bit chuck extension rod. This set features a 3-jaw construction that provides excellent contact and better grip with drills and mills. Made of high-quality steel, it offers good flexibility and wear resistance, ensuring durability and reliability in various woodworking tasks. Technical specifications Material: High-quality steel Construction: 3-jaw Usage Portable clamping High precision Stable clamping to improve work efficiency Compatible with high-precision electric milling machines for woodworking