- RP-1: .9mm straight internal. Opens from 22mm down to 0 (tips touching)
- RP-2: 1.3mm bent internal. Opens from 22mm down to 2mm (center to center)
- RP-3: 1.3mm bent external. Opens from 2mm (center to center) up to 18mm
- RP-4: 1.7mm bent internal. Opens from 21mm down to 2mm (center to center)
- RP-5: 1.7mm straight internal; Opens from 25mm down to 0 (tips touching)