5C Hex Collets, 7 Pcs/Set, Size Including 1/4'', 5/16'', 3/8'', 1/2'', 5/8'', 3/4'' and 7/8'', 0223-0309 Hand Tools Two precision ground rails are

Two precision ground rails are included

#509S-007M

Overall Length: 8''

Conversions to popular hardness scales can be selected on the touch screen

Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials

5C Hex Collets, 7 Pcs/Set, Size Including 1/4'', 5/16'', 3/8'', 1/2'', 5/8'', 3/4'' and 7/8'', 0223-0309 Hand Tools Two precision ground rails are5C Hex Collets, 7 Pcs Set, Size Including 1 4'', 5 16'', 3 8'', 1 2'', 5 8'', 3 4'' and 7 8'', 0223 0309 7pcs set: 1 4", 5 16", 3 8", 1 2", 5 8", 3 4", & 7 8". Made of high quality spring steel Hardened and precision ground Collet end OD & ID threaded Accuracy: 0. 0005" TIR The collets were developed primarily for work holding, unlike most other machine collet systems Each collet has an external thread at the rear for drawing the collet closed and so