Item #: GM20152004000Manufacturer: Rego-FixMfg #: 1520.04000Technical Specifications:*Brand Name: Rego-Fix *Collet Style/Fits: ER20 *Description: ER20 Tapping Collet *Shank Size: 4mmDescription:*Spring loaded axial compensation *Available in ER11 through ER40 *Inch and metric sizes *Hard start with cushion build-up as it is used *Save threads when tapping on older machines *Feed at 95% of tap pitch *Fits all standard ER holders and nutsShipping Info:*Actual Weight - .2500