| Single R4959 | Double R4969 | |
| Description | Series 17 single and becket V jammer for 6mm line using removeable clevis pins | Series 17 single and becket V jammer for 6mm line using removeable clevis pins |
| Line Diameter | 6 mm | 6 mm |
| Bearing Type | Plain | Plain |
| Sheave Diameter | 17 mm | 17 mm |
| Weight | 13 g | 21 g |
