This versatile switch can be found in many models of battery chargers, and can also be used as a cost-effective retro-fit to replace more expensive OEM switches in many others. Designed to be easy to install through a 7/16" stem-mounting hole. Wire terminals use .250" industry-standard solderless push-on connectors. No specialty tools required. When oriented with the "OFF" position at 12 o'clock, this switch has 4 contact positions at the 2, 4, 6, and 8 o'clock positions. NOTE: EFFECTIVE 7/2022, THIS SWITCH IS SHIPPING WITH A LARGER, HEAVY-DUTY SKIRTED KNOB WITH A BRASS SLEEVE AND SET SCREW. SEE IMAGES.