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- Total runout less than .0003 on these precise ER20 collets
- Made from Alloy spring steel and fully hardened
- All critical collet surfaces are precision ground
- Works with coolant thru spindle tooling or collets chucks with internal coolant supply
- Collet seals coolant from within tool holder and routes it thru holes around perimeter, see picture
- Works in all ER20 Collet Chucks
- This ER20 collet has a full .015 range of collapse while maintaining full accuracy
- This ER20 collet has a range of .2500-.2350 inches
- MariTool Part# is .250-ER20CJ-1/4
