Carson Tracker 8x21mm Porro Prism Compact Lightweight Binoculars Grey TZ-821 You don't need any lubrication

You don't need any lubrication for these stones but now and then you should consider cleaning them with water and liquid soap

bright image

press down on the cam lever to disengage then swing the blade back into the closed position

Jimping on both blade and handle provides for a secure grip and cutting control

Carson Tracker 8x21mm Porro Prism Compact Lightweight Binoculars Grey TZ-821 You don't need any lubricationThe TZ 821, Tracker is a compact, 8x21mm binocular. It has multi coated lenses. The Tracker binocular has a center focus knob with an independent right diopter to adjust maximum focusing flexibility for all types of vision. These binoculars feature roll down eyecups for eyeglass wearers. Magnification: 8x Prism type: BK 7 Porro Prism Objective lens diameter: 21mm (larger=more light) Lens coating: Fully Multi Coated Eye relief: 10. 5mm Weight: 0. 32