THERMAL SHRINK CHUCKING SYSTEM Standard ER Collet Chucks SHRINKIN ER Collet …HSK 40, 50, 63, 100 Compatible with Standard ER Collets DIN 6499 ER20 ER25 ER32 …BT 30, 40, 50 d …CAT 30, 40, 50 d …ISO 30, 40, 50 d SHORTIN CAT 40, 50 BT 40, 50 HSK 63, 100 Integral Holder d HSK A/E-SRK CAT-SRK BT-SRK 848