Each holder lab certified for accuracy and balance. CAT 50, ER 16 Collet Chucks. CAT 50 x ER 16 - 6.00, hex nut. Other Available CAT 50 ER 16 Collet Chucks.Listings are described with detail information. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Chucks\Collet Chucks". The seller is "hpcecs-online" and is located in this country: US. This item can be shipped worldwide.