For drilling and deburring in fine sizes; Retractable; Iron cap and chuck for abrasion resistance; Rubber grip for non-slip force; Head rotary cap; 2 collet chucks (inside the main unit); Compatible size: 0.04 - 0.1 inches (0.1 - 3.2 mm); Body dimensions: 4.0 inches (10 mm), Tip diameter 0.6 inches (15 mm). Set contents: Main unit, collet chuck. Chuck: Iron; Packaging: : Card/Blister Pack