Olfa Art Knife AK-4 with accessory bladesAcetone resistant handle Quick spin blade change Included 2x Precision KB4 S 1x Chisel KB4 F and 1x Curved Carving KB4 R art blades With anti slip, cushion grip handle, giving you added comfort. Weighted bottom to give the knife improved balance and stability. Anti roll device as an extra safety feature Blade changes can be made with a quick spin of the blade holder.