Superior Electric RC025PC 1/4 Inch Router Collet Replaces Porter Cable 42999 For use with 1/4 inch shank router bits | 1/4 inch router collet Material: Steel | Helps decrease the amount of lost bits Color: Black | Diameter: 0.25 inch Outside Diameter: 0.25 inch | Collet Nut size: 1/4 inch Length: 1.25 inch