Color: black, Dimensions: approx. 68 * 22 * 30 mm Quick-release drill chuck for cordless screwdrivers for all devices with 6.35 mm (1/4 in) collet chuck from 0.3 to 6.5 mm It can be easily clamped into the chuck of a screwdriver or and holds the smallest drill bits perfectly in the middle! It can also be very noticed, so that no drill bit turns hollow! This means that the drill bit does not turn even if there is resistance! That in large chucks the small drill bits do not hold properly or do not center, this problem is finally fixed with this little helper now! Instant impact wrenches do not convert drill bits quickly and change driver to keep Tool-free change and tightening of the drill Size: 0.3 to 6.5 mm Properties: 100% quality and brand new Easy to use and install Convenient, safe and fast Simply lock on the and gives drill crowns Allows to use hex power tools to drive, but the drill crowns Specification: Color: black General hex handle input connecting rod: 6.35 mm Drill chuck