1EXCELLENT PERFORMANCE: This self tightening drill chuck has excellent strength, resulting in a long lifespan and efficient performance. Its robust construction ensures long lasting excellent performance. 2STRONG CLAMPING FORCE: The clamping force of this self tightening chuck increases according to the required force. The unique thrust bearing allows the handle to apply torsion, generating greater clamping force. 3KEYLESS DESIGN: With a keyless design, tightening and loosening are done manually, allowing for quicker and easier clamping and releasing. 4WIDE APPLICATION: This drill chuck is widely used in various drilling machines, milling machines, lathes, boring machines, and electric or manual tools. 5PRACTICAL AND EFFICIENT: With its practicality and efficiency, this self tightening drill chuck is a reliable tool for daily use. Its performance, durability, and ease of use make it a valuable addition to any work space. 1 x Self Tighten Drill Chuck 1 x Extension Bar 1 x Storage Box