Great set of ER32 collets made from quality spring steel.  8 sizes, listed below. 

Don't for get to ask the other guy how they measure T.I.R. - Jack

• Precision ground MT3 collet chuck
• Threaded for 7/16" x 20 UNF drawbar
• Collet T.I.R. 0.0006" - 0.0008" (see picture) 
• Housed in wood box
• Spanner included

Metric (mm)	Inches	Fractions
6-7	.236 - .276	1/4"
7-8	.276 - .315	5/16"
9-10	.354 - .394	3/8"
11-12	.443 - .472	7/16"
12-13	.472 - .512	1/2"
14-15	.551 - .591	9/16"
15-16	.591 - 630	5/8"
19-20	.748 - .787	3/4"

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