Use with ER, RD, DR, ESX or BR collect chucks for coolant-thru tool application. For best result use with Power Coat nuts to increase clamping pressure up to 75%. Techniks ER collets are the best in the industry. They are made from high-carbon bearing steel that is heat-treated for improved flexibility and longer life.Each collet is precisely ground and individually insepected and tested for quality. Listings are described with detail information. Every listing or items have digital images from every angle from buyers perspective. Techniks ER 25 7/32 to 5/8 x 32nds Steel Sealed Coolant CNC Collet Set" is in sale since Friday, July 12, 2019. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Collets\Coolant Collets". The seller is "hpcecs-online" and is located in Hamden, Connecticut. This item can be shipped worldwide.