uxcell ER11 1/8 Inches Spring Collet Holder CNC Milling Lathe Tool Model No.: ER11; Overall Size: 11 x 18mm/ 0.43" x 0.7"(Max.D*H) Material: Stainless Steel; Color: Silver Tone Weight: 9g; Package Content: 1 x Spring Collet Clamping Diameter: 3.175mm/1/8" Product Name: Spring Collet