Steel sealed collets are available for ER 16 to ER 40 size holders. We stock all standard sizes from 3/32" to 1" for coolant-thru-tool shank sizes. Steel sealed collets work with ER holders & nuts with a coolant-thru retention knob, or with DIN coolant style holders.No seals to failSealed up to 2,000 P.S.I.No coolant discs to installUses standard ER holders and nutsOne-piece solid steel design
