Laube Big K Style Blade Combs (Set of 6) E-Z snap on locks on to all 4 sides of the blade, no tools required ; E-Z to sterilize Fits all professional clippers with standard snap on style blades! Rigid plastic does not bend or wobble in hair, leaves smooth even clip with no tracks or lines; Better than metal combs! Great for dogs, cattle, sheep, cats and show animals! Cuts scissor time; Reduces hand fatigue and carpal tunnel; Perfect for vacuum clipping!