The Tonic Studios Craft Knife 18mm offers the following features as the perfect product for detailed cutting - ✓ Precision ground stainless steel razor sharp snap-off strip blades - 18mm deep ✓ Includes additional snap-off strip blades stored in the body of the product ✓ Easy to extend and retract the blade via side switch ✓ Blades retract fully into the body to provide maximum safety when not in use ✓ Steel body frame to ensure strength and rigidity ✓ Simple process to remove the blade and install replacement ✓ Kushgrip soft touch body to prevent hand fatigue and increases the accuracy of cutting action Please note we are not permitted to sell a knife or blade to anyone under 18. Criminal Justice Act 1988 (as amended).