The M12 FUEL INSIDER Extended Reach Box Ratchet is Milwaukee's latest solution to the ratcheting lineup. This new to world solution reinvents the traditional ratchet through Milwaukee's Patented head technology that allows sockets & adapters to insert directly into the tool. The M12 FUEL INSIDER delivers the Lowest Profile with socket to reach deep into the engine bay and access the tightest spaces. With the provided INSIDER Box Ratchet Sockets (8-19, & 21mm), " Hex Bit, " anvil adapter, & 3/8" anvil adapter users will experience the Most Versatile ratcheting solution to get any job done in the shop or on the jobsite. The Box Ratchet Sockets are pass through up to 15mm & 9/16" to run nuts on threaded rod and eliminate the frustration of sockets bottoming out. The INSIDER delivers the combination of 60 Ft-lbs. of max torque and 350 RPM's to remove stubborn fasteners and complete work faster.