This adapter attaches to the hose connection and it isnt necessary to unscrew the handpiece. The 6-hole connection includes the 4 holes described on the Midwest connection plus 2 metal pins to provide the required elecricity for the power supply. The item "Sirona T2 Boost Turbine With Optic Fiber HIGH SPEED HANDPIECE Titanium-coated" is in sale since Tuesday, June 11, 2019. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Handpieces & Instruments\Other Handpieces & Instruments".The seller is "yangtzehanriver" and is located in Tibet, CHN. This item can be shipped worldwide.