Specification: Increasing 1:5 ratio Clamping force: 4.0kg The size of the head: 10mm x 14.65mm Internal four spray Rotate speed :200000rpm Chuck type:push button Brightness:32000lux Import ceramic bearing Noise :≤58db Bur applicable:∅1.59-1.60mm ISO stand connector Works on electric motors that have a universal “E” type connection