Toolholder blanks Reference: 020 19 02 .. .. K D L L1 COD. Quantity 63 63 100 74 020 19 02 04 71 - The area of diameter D and length L1 has approximately 980N/mm². - Rest is hardened to 57 ÷ 60 Rc. Supply options 000 004 19 06 .. .. Collet chucks ER type (DIN 6499) 012 19 12 .. .. Shrink fit chucks - STANDARD - 020 19 02 .. .. Toolholder blanks