• All ERs are dynamically balanced (not normally sold outside)
• High quality steel material
• Collet with accuracy <0.008mm
• ER has types ER11A, ER16A(M19x1)(M22x1.5), ER20A(M25x1.5), ER25UM and ER32UM
• Collet has the following types: 3,175.4.00,5.00,6.00,6.35,8.0,10.0,12.0 and 12.7