Sehemu ya hisa.: 4562
Mtindo: Cylindrical, Dual Level, Andika: Knurled, Straight, Ukubwa wa shimoni: 0.250" (6.35mm), Kipenyo: 0.500" (12.70mm) Top, 0.750" (19.05mm) Bottom, Urefu: 0.532" (13.50mm) Top, 0.625" (15.90mm) Bottom, Kiashiria: Line on Both Knobs,