Hyde Tools 66360 Double End V-Cut Trim Knife Blade BG391

A station blade cuts under handle pressure, so present only as much blade as the trim needs — over-extension turns an 18-gauge blade into a lever and costs it its plane. Keep the flanks flat; let the notch shear. The mounted V-cut fails the same way the handled one does — lift the trailing flank and the notch walls dig into the part face; hold it flat and let the converging walls do the work. Flip before you fight a dull end. The double end exists so no one trims with a tired edge — turn the blade end-for-end at the first sign the cut is dragging; that is the design's whole point. Then replace from the box. When both ends are spent the blade is consumed — that is the economy, not a failure; a fresh BG391 comes out of the drawer and the handle is bought once. Hone the notch, not a flat: if an end is touched up rather than flipped, dress the inside walls of the V with a slim slip stone or fine tapered file following the taper; a flat bench stone rounds the flanks (authored trade knowledge; no Hyde maintenance text). High-carbon steel — keep it dry after wet work.