A cutting apparatus, comprising: a plurality of cutting elements ; each cutting element comprising an L-shaped protrusion that projects upwardly and outwardly from a cutting element body ; each cutting element body having a cutting element tooth facing inward toward the interior of the cutting apparatus midline; each cutting element tooth having at least two cutting surfaces oriented in at least two different directions, thereby allowing the cutting apparatus to sufficiently penetrate a substance via moving in at least two different directions defined by the different directions of orientation of the cutting surfaces ; wherein the cutting apparatus further comprises a plurality of anti-kickback connecting links positioned on either side of the cutting elements and on the same side of the cutting apparatus, and displaying protruding curved teeth oriented toward the cutting element ; at least one partially flexible elongated element , having an orientation corresponding to that of the cutting elements and sharing the same connection point as the cutting elements , wherein the cutting element is arranged on the flexible elongated element in a manner so that at least two cutting surfaces face substantially opposite directions; a plurality of bar guide links capable of receiving, equally, one-half cutting element and one-half flexible elongated element centrally, each of the cutting elements being pivotally attached to a bar guide link ; the next sequential bar guide link is capable of receiving the second half of said cutting element and two anti-kickback connecting links ; and a plurality of rivets , or like connectors, joins each bar guide , cutting element , anti-kickback connecting link and elongated element to one another a plurality of cutting elements ; each cutting element comprising an L-shaped protrusion that projects upwardly and outwardly from a cutting element body ; each cutting element body having a cutting element tooth facing inward toward the interior of the cutting apparatus midline; each cutting element tooth having at least two cutting surfaces oriented in at least two different directions, thereby allowing the cutting apparatus to sufficiently penetrate a substance via moving in at least two different directions defined by the different directions of orientation of the cutting surfaces ; wherein the cutting apparatus further comprises a plurality of anti-kickback connecting links positioned on either side of the cutting elements and on the same side of the cutting apparatus, and displaying protruding curved teeth oriented toward the cutting element ; at least one partially flexible elongated element , having an orientation corresponding to that of the cutting elements and sharing the same connection point as the cutting elements , wherein the cutting element is arranged on the flexible elongated element in a manner so that at least two cutting surfaces face substantially opposite directions; a plurality of bar guide links capable of receiving, equally, one-half cutting element and one-half flexible elongated element centrally, each of the cutting elements being pivotally attached to a bar guide link ; the next sequential bar guide link is capable of receiving the second half of said cutting element and two anti-kickback connecting links ; and a plurality of rivets , or like connectors, joins each bar guide , cutting element , anti-kickback connecting link and elongated element to one another <EOS>