Specification: Special 4 flute design with a 0.8 degree taper ensures tight plugs every time. Made in Austria.
Guaranteed for life.
Diameters available, 373 Series 1/4", 3/8", 1/2", 5/8". 3/4", and 1".
All sizes have a 11/16" flute & a 1-1/16" OAL.