This T-203 7/8 in. O.D. Bulb Auger fits 3/8 in. Drum and 5/8 in. Sectional cables: C-4, C-6, C-7, C-8 and C9. For use with K-45 Sink Machine, K-40 Sink Machine, K-400 Drum Machine, K-3800 Drum Machine and K-50 Sectional Machine. The bulb auger has 7/8 in. O.D.