Accusize Tools - CAT40 to ER32, 2.76 in, CAT40 V-Flange Collet Chucks, from ER32 to ER40, 1601-0015 For ER32 Collet Made of alloy forged steel, hardened to HRC 52-56 Draw Bar Thread 5/8-11 Taper: CAT40; Collet Series: ER32; Projection Length: 2.76&#039;&#039;; Range: 1/8&#039;&#039;-3/4&#039;&#039; All critical surface are precision ground Concentricity is less than<span class="a-text-bold">0.0001&#039;&#039;</span>from taper to end mill pocket 8000 RPM Packed in Fitted Box