Milwaukee 48 11 1813 Battery Pack, M18™, 12 Ah, Battery Included, 18V DC 30745T449 Arc Swing 25 Degrees Wrench Arc Swing 25 Degrees Wrench Shape Straight Head Movement Fixed Box End Style Square Wrench Product Grouping Wrenches Reversing Yes Flexible Head No Tether Capable Tether Capable Offset 0 Degrees Wrench Material Steel Wrench Item Ratcheting Box End Wrench Single End Double End Double End Insulated No Ratcheting Configuration Box End Ratcheting Yes Grip Style plain Box End Type 4 Point Box End With a 1 2" drive and longest life batteries within REDLITHIUMTM Fully compatible with the M18TM system 35 minute supercharge to 80%