General description This 14-piece recessed screwdriver insert set features a unique recessed sleeve design that ensures a firmer grip, making it easy to install and disassemble. The set includes various sizes to meet diverse needs, making it compatible with most corded or cordless drills. Crafted from high-quality steel, these inserts are rustproof, non-slip, and designed for high occlusion, providing a tight and flexible connection. Technical specifications Number of pieces: 14 Sizes: 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm Machining depth: 34mm Total length of each insert: 80mm Compatibility and accessories Compatible with air screwdrivers, electric screwdrivers, pneumatic drills, electric drills, and manual screwdrivers Includes 14 screw bases Installation Easy to install and disassemble Designed for hard-to-reach nuts or bolts Usage Ideal for loosening and tightening hex bolts and nuts Suitable for construction sites, woodworking, and