Are you looking for a set professional, yet affordable spring collet? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further Our professional spring collet set must meet you needs. It is one of the best choices for you. Features - Color: Silver. - Size: 4 x 3.2 x 3.2 cm. - Material: Steel. - Available in the BT ER extension rod handle, can be used for clamping drill, milling Tool. - Performance stability, high accuracy - Durable and wear-resistant. - Large holding force, wide clamping range. - Spiral collets are widely used in boring, milling, drilling, tapping, grinding, and engraving, and so on. - Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you