Correct Methods Of Mounting The Clamp: 1. Place The Chuck Into The Presser Cap, Gently Rotate The Collet Spring When The Eccentric Part Of The Collet Spring Groove Recessed In The Presser Cap. In The Direction Of The Arrow And Using The Same Force To Push The Clamping Spring, You Can Mount The Pressure Cap. 2. Place The Collet Spring And Cap Together On The Chuck Or Spindle Body. Insert Into Clamping Hole After Wiping. The Cylindrical Rod, Use A Spanner; To Tighten The Pressure Cap, Until The Tool Is Tight. Before Use. Note: Avoid Securing The Presser Cap With An Uninstalled Tool. In Order To Avoid Damaging The Clamping Spring. 3. À Using A Wrench, Loosen The Pressure Cap And Remove The Chuck Or Tool, Then Remove The Tool. In The Direction Of The Arrow, Push Back The Clip Spring, Then, If Necessary, Replace The Other Clip Spring. Specifications: Model: Er11 Material: First Class 1065 Carbon Steel Clamping Range: 1Mm To 10Mm 7Mm (1Mm, 1.5Mm, 2Mm, 2.5Mm, 3Mm, 3.5Mm, 4Mm, 4.5Mm, 5Mm, 5.5Mm, 6Mm, 6.5Mm, 7Mm) End Of Stroke Tolerance: Total Height: 18Mm / 0.71Inch Diameter Outer Be (Max.): 11.5 Mm / 0.5 Inch For Metric Rod Sizes: For Example, 1 Mm Collet Is Suitable For Metric Shank, 2Mm Collet Fits; A 2Mm Metric Rod Package Includes: 1 Set (13Pcs) X Er11 Collet