Faster maintenance with a new self-cleaning arc adjustment screw - Heavy-duty cover assembly for extra durability | Rain Curtain Nozzles - Slip clutch mechanism for quick adjustment on installation | Heavy-duty retract spring assures positive pop-down | The product is 93460 SPACER, AUTO FEED^The product use for self feed bits^This product manufacture by United States | The product is 93460 SPACER, AUTO FEED^The product use for self feed bits^This product manufacture by United States