5PC CAT40 ER 16 Precision Collet Chuck 2.75 projection length. High Speed True Balance in 20K RPM. Coolant through and Anti Rust design. See video below, indicator is 0.0001", testing run out on the holder is 0.0001" as well, so the tool holder is running true. Cat40 er16 holder shows 0.0001 accuracy, running true.Video will open in a new window. Here is 10PC Chuck with Pull studs. Here is 10PC Chuck without Pull Studs. Here is 10PC Chuck with Collets and Pull Studs. Both Holders and Collets must be running True. Gage or projection length of ER 16 is 2.75. Fully ground flange and V-groove - easy on tool changers for less spindle and changer maintenance V-Flange CAT 40 is production balanced to high speed spindle turning and meet standard industrial needs. High Speed True Balance in. Hardened and ground to ensure maximum accuracy. Through spindle coolant capability from pull stud to collets. Decent quality at reasonable price All chucks are passed hardness and anti crack test. Low strength steel could lead crack and rust very soon, especially by the inside pocket area, accuracy will drop too after a little while, so make sure avoid those bad steel and unbalanced chucks. All sellers claim 20K balance and good steel, but yes or no, time will tell. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Other Toolholding". The seller is "tpactools2" and is located in this country: US. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.