Milwaukee 48-28-2010 Description The Milwaukee QUIK-LOK 3/8 in. Universal Extension provides enhanced reach and is compatible with most 3/8 in. hex shanks, with or without a power-groove. Requiring no tools to release accessories, change outs are fast and efficient. Milwaukee 48-28-2010 Includes (1) 6" QUIK-LOK 3/8" Extension Milwaukee 48-28-2010 Features The Milwaukee QUIK-LOK Design Requires No Tools to Release Accessories, Making Change Outs Fast and Efficient Accepts Most 3/8 in. Shanks, With or Without a Power-groove Hardened Shank For Maximum Durability Requires Minimum Chuck Size of 3/8 in.