Designed as part of the AP Racing Dry Bleed system for hydraulic brakes this male dry bleed valve replaces the bleed screw on the caliper and allows for leak free bleeding with no possibility of allowing air into the system while bleeding . The integral valve remains shut until the female bleed coupling is attached (not included) and then system bleeding can take place. Once bled simply remove the female coupling and replace the protective cap on the male dry bleed valve.Part of the AP Racing 'Dry Bleed System'Replaces the bleed screw on the caliperAllows for leek free bleeding and eliminates the chance of air being introduced to the systemReplaces bleed screws with an M10 1 thread.  Female bleed coupling sold separately.