Jeweler's Large 7" Push Drill for Micro Bits Classic jeweler's tool for use with micro-sized drill bits or other accessories Chuck rotates as handle is depressed, internal spring 'rewinds' handle to top; adjustable tension Included collets accept bits from 0.25mm to 1.5mm, fits other 5mm collets up to 2mm capacity Brass and steel construction with mirror chrome finish; free-spinning finger grip at chuck Use for jewelry & watch fabrication & repair, electronics & circuit boards (drill bit not incl)