Adjustable laser line allows user to adjust line to the left or right side of blade. Protected laser diode in optimum location delivers long-term durability while keeping laser diode clear and visible * On/off switch allows laser to operate with or without blade spinning * Compatible with DW713 Type1, DW715 Types 1 & 2, DW716 Types 1- 4, DW717 All Types and DW718 All Types * Bright laser line delivers enhanced visibility in low and high light locations * Upper guard mount location line visibility through entire range of motion, powered by saw (no batteries)