A surgical system comprising: a first template comprising a first shaft extending along a first axis (X1) between a first proximal end and a first distal end , the first template comprising a first engagement portion configured for insertion between vertebrae of a patient, the first engagement portion comprising a first rod extending from the first distal end at an acute angle (α) relative to the first axis (X1) and a first head coupled to the first rod , the first head comprising a first cylindrical wall having a first diameter (D3); and a second template comprising a second shaft extending along a second axis (X1) between a second proximal end and a second distal end , the second template comprising a second engagement portion configured for insertion between the vertebrae, the second engagement portion comprising a second rod extending from the second distal end at an acute angle (β) relative to the second axis (X1) and a second head coupled to the second rod , the second head comprising a second cylindrical wall having a second diameter (D5), wherein the first diameter (D3) is different than the second diameter (D5), characterized in that the surgical system further comprises a third template comprising a third shaft extending along a third axis (X1) between a third proximal end and a third distal end , the third template comprising a third engagement portion configured for insertion between the vertebrae, the third engagement portion comprising a third rod extending from the third distal end such that the third rod is parallel to the third axis (X1) and a third head coupled to the third rod , the third head comprising a rectangular geometry. a first template comprising a first shaft extending along a first axis (X1) between a first proximal end and a first distal end , the first template comprising a first engagement portion configured for insertion between vertebrae of a patient, the first engagement portion comprising a first rod extending from the first distal end at an acute angle (α) relative to the first axis (X1) and a first head coupled to the first rod , the first head comprising a first cylindrical wall having a first diameter (D3); and a second template comprising a second shaft extending along a second axis (X1) between a second proximal end and a second distal end , the second template comprising a second engagement portion configured for insertion between the vertebrae, the second engagement portion comprising a second rod extending from the second distal end at an acute angle (β) relative to the second axis (X1) and a second head coupled to the second rod , the second head comprising a second cylindrical wall having a second diameter (D5), wherein the first diameter (D3) is different than the second diameter (D5), characterized in that the surgical system further comprises a third template comprising a third shaft extending along a third axis (X1) between a third proximal end and a third distal end , the third template comprising a third engagement portion configured for insertion between the vertebrae, the third engagement portion comprising a third rod extending from the third distal end such that the third rod is parallel to the third axis (X1) and a third head coupled to the third rod , the third head comprising a rectangular geometry. <EOS>