HIGH QUALITY: This adjustable hobby drill has 3 jaw hardened steel keyless chucks to grip the small drill bits tightly. After many uses the drill bit does not skid and not fall off. And can adjust twist drills with a diameter of 0.2 - 3.4mmCOMPATIBLE AND USEFUL: The hand drill pin vise can hold small drills; deburrers; wires; reamers is useful for electronic assembl; tool mak; model mak.WIDE APPLICATION: The small hand drill can be applied to the wood; jewelry; PVC; walnut; amber; beeswax; olive nut; acrylic and plastic etc.NOTE: The adjustable pin vise is a manual tool not a power tool; Twist drill bits set can't fit to hard ths like steel; iron; stone.Compact size manual hand drill is good to store in a toolbox or in pocket.A manual pin vice may be used instead of a power drill for very exact drill.Despite us a ower drill speed, it can still be difficult to get as precise with a drill as when us a pin vice.This is important in order to tasks such as watch repair where any ip or knock could damage other components in the device.Chuck clamp range: 0.5 - 3.4 mmTwist drill bits material: high speed steelDrill specifications:0.5/ 0.6/ 0.7/ 0.8/ 0.9/ 1.0/ 1.2/ 1.4/ 1.6/ 1.8/ 2.0/ 2.3/ 2.5/ 2.8/ 3.0mmMaterial: alloyLength: 95 mm/ 3.74 inchColor: silver & blackPackage Contents:1 * Hand drill30 * Twist drill bits the above package content, other products are not included.Note: Light shoot and different displays may cause the color of the item in the picture a little different from the real th. The measurement allowed error is +/- 1-3cm.