Techniks ER40 Precision Collet Set, 13 Piece - 04213IS (1/8" - 1" by 1/32nds) Average. 039 Collapse Range, CNC Tooling SYIC, Average. Specs Collet Series: ER40 Material: 52100 Bearing steel Number of Pieces: 13 Sizes: 1/8" - 1" increments by 1/32nds Collapse Range.Actual item will match description. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Collets\16C Collets". The seller is "cutting_edge_tool" and is located in this country: US. This item can be shipped to United States.