Please refer to the following description for the actual product size specification
Size specification and color: one black 0.3-6.5mm and one black 0.3-3.6mm
Ideal Accessor: 1/4-inch hex shank snaps easily into the power screwdriver.
Easily the locks and releases drill bits, quickly convert your quick change hex shank driver unto a drill.
Application: Allows hex drive power foitechy tools to use but drill bits.Using Convience: Install Conveniently, safely and quickly.can be use with other brand tools and drill bits
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