Feature(may vary by option.)

●High precision R8 collets set tool: this R8 collets set with high accuracy 0006" TIR. Hardened and ground processing, with great performance and long use time. Will durable and practical use.
●Size: 1/8" 3/16" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8"
●7/16 inch-20 internal thread
●hardened & ground, for Bridgeport type

[13PC 1 & 8-7 & 8 x 1 & 16 Ths]

Description

Size: 1/8\" 3/16\" 1/4\" 5/16\" 3/8\" 7/16\" 1/2\" 9/16\" 5/8\" 11/16\" 3/4\" 13/16\" 7/8\"
Accuracy .0006\" TIR
Drawbar thread: 7/16\"-20.
Material: 65Mn.
Hardness: clamping part HRC 55-60 elastic part HRC 40-45.
Applicable: This unit is applicable to all sorts of milling machines,which spindle taper hole is R8.