GC-20 Early Entry Blades for Hard Aggregate
| Diameter | Width | Arbor | Part # | |
| 6-3/8" | (162mm) | .100" | Tri-1" | 171938 |
| 6-3/8" | (162mm) | .225" | Tri | 171939 |
| 8" | (203mm) | .100" | Tri-1" | 171940 |
| 8" | (203mm) | .225" | Tri | 171941 |
| 10" | (254mm) | .100" | Tri-1" | 171942 |
| 10" | (254mm) | .125" | Tri-1" | 171943 |
| 12" | (305mm) | .125" | Tri-1" | 171944 |
| 12" | (305mm) | .250" | Tri | 171945 |
| 13-1/2" | (343mm) | .125" | Tri-1" | 171946 |
| 13-1/2" | (343mm) | .250" | Tri | 171947 |