48-28-1040 Milwaukee 12" x 7/16" Universal Quik-Lok ExtensionThe 7/16" Universal QUIK-LOK Extension has an innovative design that fits all 7/16" shanks - with or without a power-groove. The uniques design requires no tools to change out bits, making it fast and efficient. These new extensions are impact rated for maximum durability. Features:•  Exclusive Quik-Lok accepts all 7/16" shanks.•  Quick change of bits, no tools required.•  Impact rated, making this the most versatile extension on the market. Specifications:•  Length: 12"•  Fits all 7/16" shanks