MW-1™ Magnetic One Finger Reversible Ratchet Knob The MW-1™ Magnetic One Finger Reversible Ratchet Knob™ is designed to simplify your tasks both in the workshop and on the job site. The MW-1™ is designed for larger “high-torque” models. For smaller head ratchets, the MW-2™ may be a better choice. Compatible with the following Milwaukee Part Numbers:. US: 2557-20, 2558-20, 2559-20, 2560-20. EU: FIR12, FIR38, FIR12LR, FIR38LR. NOT BOOT COMPATIBLE. Contact us if you don't see your Milwaukee tool listed here. MW-1™ Magnetic One Finger Reversible Ratchet Knob™ unique features:. Magnetic Design: The magnetic feature holds the knob in place, allowing you to work quicker and with greater precision. One-Finger Operation: The ratchet knob is incredibly easy to reverse direction with a one-finger operation, saving you time. Glove friendly: Significantly increases grip on the directional switch, giving the user a much better experience in gloved hands. To ensure solid contact, please make sure your ratchet head is clear of any dirt or debris. Then simply slide the MW-1™ onto your existing ratchet and you're ready to go! No additional tools needed. Get your tasks done quickly and efficiently with the MW-1™ Magnetic One Finger Reversible Ratchet Knob™ RK-MW-01-RD