Buy your ER collet chucks from DZ Sales. We are machinists who work in the industry and understand the challenges within. The DZ Sales tools that we have, we use in our own machine shop. If we do not know or doubt the performance, we won’t sell it. We have collet chuck holders made from hardened alloy steel, usable in BT40 machines, compatible with all ER collets, and have coolant through to minimize overheating. Our collet chucks are rated to 20,000 RPM and deliver balanced high precision. Create an account and start earning rewards with every purchase. You’ll become eligible for exclusive deals and promotions. When you refer a friend, you’ll give them 20% off their first purchase and get 20% off your next purchase.