Conventional needleholders have elastic arms and lock with the aid of
three or four triangle-shaped teeth ends on the arms. Because of these
springs, the needle is not absolutely fixed. The Erk needleholder(1)
has thick, rigid and strong arms. Locking is obtained by the counter-b
alancing system and it securely holds the needle. (C) 1997 Elsevier Sc
ience B.V.