Strong, durable construction: made from carbon steel for improved wear resistance and long service life. Fast bit changes: built-in strong magnetic retention keeps bits secure and allows quick swapping during work. Designed for deep drilling: 300 mm length with a hexagonal shank extends reach for deep or hard-to-reach holes. Secure, slip-free operation: a positive locking mechanism prevents bit slippage for stable, accurate drilling. Precision and stability: engineered to maintain alignment during extended, deep-hole operations. Professional and DIY ready: ideal for renovation specialists and home DIY enthusiasts who need reliable, repeatable performance. Specifications Material: carbon steel Length: 300 mm Shank: hexagonal Key features: magnetic retention for quick bit changes, locking mechanism to prevent slippage Practical applications Renovation and remodeling: reach studs, behind cabinets, or deep wall cavities when installing wiring, fixtures, or anchors. Electrical and plumbing work: access recessed spaces to drill passage holes for cables and pipes without dismantling surrounding materials. Carpentry and cabinetry: install long fasteners or reach recessed screw locations in furniture, built-ins, and trim. This hexagonal-shank 300 mm extension shaft is a straightforward upgrade to any toolkit when accurate, efficient drilling in challenging or deep locations is required.