Ultra sensitive drill in an aluminum housing, specifically designed to drill pearls from 3 to 7 mm diameter without any chipping or cracking. Unit is compact with a motor, drill chuck and self centering vise to automatically hold pearls for center line drilling. High precision slide is operated manually with a handle. Dimensions: 145 x 235 x 122 mm. Unit includes: Machine with chuck and pearl holders in pairs. 5 mm, 6 mm, 7 mm,8 mm & 9 mm.