1/4" Hex shank quick change and adjustable collar, one hand operation, fit most common drill chucks and tools
Magnetic bit holder is great for extending all kinds of screwdriver bits, drills, converts any variable-speed drill into a power screwdriver
Secured Bit Holder Built in strong permanent magnet(the hole part), shaft holds bit securely, great for working with hard to reach screws
Great for exchanging the sleeve and the joint, prolonging the connecting rod.
Including 2.5", 4", 6"(60mm/ 100mm /150mm), 3pcs meet your various needs