Item Type: Drill Chuck Product Material: Carbon Steel Product Colour: Black Thread Specification: Approx. 8 x 0.75mm / 0.31 x 0.03in Clamping Range: Approx. 0.3 ~ 3.2mm / 0.01 ~ 0.13in Function: An accessory suitable for most electric grinders, can be used for drilling, cutting, polishing, engraving, etc. 1. Fast Changing: Enables quick changing of drill bit on rotating tools, no need to change the chuck, very simple. 2. Firm Clamping: With 0.3–3.2mm clamping range, the 3-jaw chuck ensures stable clamping for more reliable operation. 3. Practical Use: Ideal for most electric grinders, can be applied for drilling, cutting, polishing, engraving, etc. 4. Good Material: Made of high-quality carbon steel material, not easy to deform, very suitable for repeated use. 5. Simpler Operation: Simply rotate the head to open and close, which makes the working much more convenient. 1. If the housing of the machine head is hollow with the output shaft, the length of the output shaft protruding outside must be greater than 10mm. 2. If the machine head part is close and solid between the casing and the output shaft, the protruding length of the output shaft must be greater than 13mm. 3. For small flexible shafts, the hollow part between the handle head of the flexible shaft and the output shaft must be greater than 138mm (some small flexible shafts on the market are not compatible). 1 x Drill Chuck