With a serrated edge the effective cutting edge length is increased by approx 24%. The sharpened recesssed curve has more linear cutting surface than a straight edge. Edge retention is also greater because cutting is started by the serrations' tips, easing the workload on the recessed edges, and protecting the sharp inside cutting curves which wear less over time. Spyderco Knives 'Spyderedge' is a secondary bevel, ground on one side of the blade only, this is re-sharpened using the pointed angles of ceramic sharpening stones.    Spyderco Harpy Knife C08S developed for the marine fishing industry, curved in hawkbill blade draws material in towards the cutting edge,   Spyderco UKPK Rescue FRN Handle UK legal carry rescue blade knife with blunt tip   Spyderco Rescue 93 Knife 3.75 inch, locking blade rescue knife

Spyderco UK Penknife S30V Steel Rescue Blade G10 Handle £99.99	Spyderco UK Penknife GIN-1 Steel Rescue Blade FRN Handle £42.99 (Out of Stock)
Spyderco Atlantic Salt Knife Non Rust H1 Steel Blade £81.00	Spyderco Rescue 93 Knife VG10 Steel Blade £65.00
Spyderco Harpy Knife VG-10 Steel Blade £92.00	Spyderco Police Knife VG-10 Steel Blade £109.45
Spyderco Ladybug Salt Hawkbill Non Rust H1 Steel Blade £40.00	Spyderco Ladybug Salt Knife Non Rust H1 Steel Blade £40.00
Spyderco Civilian Knife VG-10 Steel Blade £202.00	Spyderco Remote Release Knife VG-10 Steel Blade £65.00
Spyderco Assist Rescue Knife VG-10 Steel Blade £90.00	Spyderco Spyderhawk Salt Knife Non Rust H1 Steel Blade £91.00 (Out of Stock)