Specification Brand : uxcell BulletPoint1 : Product Name : Spring Collet;Model No. : ER11 BulletPoint2 : Clamping Diameter : 6.5mm/ 0.26";Overall Size : 12 x 18mm/ 0.4" x 0.7"(Dia*Length) BulletPoint3 : Material : Stainless Steel;Color : Silver Tone BulletPoint4 : Net Weight : 6g BulletPoint5 : Package Content : 1 x Spring Collet ExternallyAssignedProductIdentifier1 : 700955448062 ExternallyAssignedProductIdentifier2 : 0700955448062 ExternallyAssignedProductIdentifier3 : 00700955448062 ItemName : uxcell Clamping Range 6.5mm ER11 Precision Spring Collet Reaming Part ItemPackageDimensions_Height : 0.508 centimeters ItemPackageDimensions_Length : 10.16 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : workholding-collets Manufacturer : uxcell Material : Stainless Steel Material1 : Carbon Steel Material2 : High Speed Steel ModelNumber : a13080800ux0443 NumberOfFlutes : 4 NumberOfItems : 1 PartNumber : a13080800ux0443 ProductDescription : ER collet is the most widely used clamping system in the world used for a variety of machining applications including boring, milling, reaming, tapping and grinding. Collet must be assembled into the clamping nut before inserting into the chuck.