AZDENT Dental 45 Degree LED High Speed Handpiece E-generator Standard Head Push Button 4 HoleAZDENT Dental 45 Degree LED High Speed Handpiece E generator Standard Head Push Button 4 Hole. 45 head for maximum access and visibility. Ceramic bearing, long life, low noise, and stable. Water cooling, no air come out from the head, avoiding the hematoma during treatment. Anti retraction, avoid the entry of oral fluids and other impurity into handpiece head. Unique electric generator, just a little air can generate sufficient power self illuminated,