Dental High and Low Speed Handpiece Kit 2/4 HolesDental High and Low Speed Handpiece Kit 2 4 Holes. High speed handpiece is standard push button type and single way water spray. Low speed kit is E type connector and wrench type. Precise technology, Steady, no vibration while revolving, offering a steady operation. Low Speed Kits Features E type connector Wrench type Precise technology, Steady, no vibration while revolving, offering a steady operation. Suitable for any E type handpiece accords with