Machine collet set 15 pcs 4-15 мм.

Description

I have not been able to determine what equipment these collets come from. They have a feature - the groove preventing rotation is located in the front part (on the skirt). The total length of the collet is 114 mm. See last photo for other dimensions.
Collet set :
4mm
5mm
6mm -2pcs
7mm
7,5mm
8mm
9mm
11mm
12mm
13mm
14mm
15mm
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Only  -15 pcs -100$ + shipping