Feature: This machine adopts pneumatic glass clamping, double side drilling alternatively which avoid broken hole edge by common one side drilling. Pneumatic worktable support large size glass operation. Easy operation, high efficiency. Technical Specifications: 1.Drilling diameter: ø4 ~ ø 120 mm 2.Thickness of processing glass: 3 ~20mm 3.Maximum distance from the middle of the drilling hole: 1020mm 4.Total power: 2.3 KW 5.Weight: 900 KG 6.Major size: 2000(L) x 1800(W) x 1700(H)mm