Please contact us if you need any help; we respond within 24 hours. Overall length: 65 mm (approx. 2.56 in). Designed for 1/4inch hex shank bits, compatible with a variety of quickchange chucks, various flashlights, and screwdrivers. Bellshaped design with a magnetic hex insert provides secure bit retention for faster installations and reduced bit drop. Material and durability: made of heattreated chrome vanadium steel; hardness, good abrasion resistance, durable and long service life. Key benefits: Reliable bit retention: bell shape and magnetic insert hold the bit securely during use. Broad compatibility: suitable for 1/4inch hex shank bits and works with many quickchange chucks, flashlights, and screwdrivers. Durable construction: heattreated chrome vanadium steel ensures longlasting performance in demanding tasks. Efficient operation: designed to enable quicker installations with fewer interruptions. Use scenarios: Assembling furniture or completing home improvement projects that require 1/4inch hex bits in quickchange chucks. Electronics or small appliance maintenance where secure bit seating speeds up work. Automotive or workshop tasks that involve frequent bit changes and require reliable retention and durability.