Incomplete stepping down the pedal switch to with automatic lubricating system, greatly makelower needle-knife move upwards, which promotes the durability an service life, low facilitate the upper needle—knife get together a noise. keep away from oil leaking.with high with the inner edge of leather needed to be pruned,
Regulate nut can meet different thickness of material to be processed
Fit with knife grinding stone for uppe needle-knife sharpening.
Sharpen the lower neddle—knife by rotaing the nut.