has walls 86 a and 86 b meeting at crease 86 c preferably creases 78 c 80 c 84 c and 86 c are formed inward at an angle less than 90 u00b0 to wall section 76 referring now to fig1 a partial lateral sectional view of tip 40 is shown with indentation 84 seen from the inside of tip 40 with the rear 84 d of side 84 a and the rear 84 e of side 84 b referring to fig1 and 18 the numerals 106 108 identify respectively lip 104 after the associated manufacturing processes have been completed lips 106 108 may if desired be polished smooth to reduce the possibility that contact between lip 106 108 will cause damage to any eye tissue referring now to fig1 sides 62 a 62 b 64 a 64 b 68 a 68 b 70 a and 70 b together with creases 62 c 64 c 68 c and 70 c form cutting or emulsifying surfaces of tip 40 when tip 40 is used in a hand piece that moves tip 40 in a torsional direction referring now to fig1 lip 106 as it is included in indentations 62 64 68 and 70 together with lands 96 98 100 and 102 form cutting or emulsifying surfaces when used in a handpiece imparting longitudinal motion to tip 40 referring now to fig1 walls 78 a 78 b 80 a 80 b 84 a 84 b 86 a and 86 b form cutting or emulsifying surfaces when used in a handpiece imparting torsional motion to tip 40 referring now to fig1 lip 108 as it is included in indentations 78 80 84 and 86 forms a cutting.