About this item Package & Size - 2 packs of 3mm die grinder collet, 2 packs of 6mm die grinder collet. Suitable for 1/8" and 1/4" standard grinding bits. Use collet chucks to add versatility to mold grinders, routers, and other tools Durable Material - The die grinder collet is made of high-carbon steel, with stable and practical performance, not easy to deform, and can be used for a long time Design - The chuck has 4 jaws to provide better contact and stronger grip. Clamp the engraving machine firmly to improve work efficiency. Application - Suitable for clamping grinding heads of various grinders, very suitable for tire repair and grinding. Compatible with most rotating tools used in hardware, hobby, home, etc. Guaranteed - 100% Satisfaction If there is any quality problem with our product, we will reply within 24 hours. And you can return the product and get a refund within 30 days from receiving. You have no risk of trying, please order with confidence and no hesitate. › See more product details