▁or ▁more ▁less ▁than ▁the ▁number ▁of ▁b ights ▁( 3 × 5 , ▁or ▁ 3 × 7 ), ▁ ▁Long ▁or ▁wide ▁where ▁the ▁number ▁of ▁leads ▁is ▁two ▁or ▁more ▁greater ▁than ▁the ▁number ▁of ▁b ights ▁( 5 × 3 , ▁or ▁ 1 6 × 7 ), ▁and ▁ ▁Square , ▁where ▁there ▁is ▁a ▁difference ▁of ▁one ▁between ▁leads ▁and ▁b ights ▁( 7 × 8 ▁or ▁ 8 × 7 ). ▁ ▁The ▁number ▁of ▁b ights ▁determ ines ▁the ▁shape ▁found ▁at ▁the ▁center . ▁Three ▁b ights ▁create ▁a ▁tri angular ▁shape , ▁while ▁four ▁create ▁a ▁square . ▁A ▁two ▁lead , ▁ 3 ▁b ight ▁Turk ' s ▁head ▁is ▁a ▁double ▁over hand ▁kn ot . ▁ ▁A ▁two ▁lead , ▁three ▁b ight ▁Turk ' s ▁head ▁is ▁also ▁a ▁t ref o il ▁kn ot ▁if ▁the ▁ends ▁are ▁joined ▁together . ▁( 2 , n ) ▁altern ating ▁tor us ▁kn ots ▁are ▁( 2 , n ) ▁Turk ' s ▁head ▁kn ots . ▁(( p , q ) ▁= ▁q ▁times ▁around ▁a ▁circle ▁in ▁the ▁interior ▁of ▁the ▁tor us , ▁and ▁p ▁times ▁around ▁its ▁axis ▁of ▁rot ational ▁symmetry .) ▁ ▁Us es ▁in ▁culture ▁ ▁The ▁World ▁Organ ization ▁of ▁sc out ing ▁uses ▁a ▁variation ▁of ▁the ▁Turk ' s ▁head ▁kn ot ▁called ▁a ▁w oggle ▁to ▁aff ix ▁their ▁ne cker ch ief s ▁and ▁as ▁a ▁fire ▁starting