External and internal square drives to DIN 3120. Forged external square drives with spring-mounted balls or pins, internal square drives with hole or snap grooves.
Supplied with:
(x?"y) inch 1/4 ?" 3/8; 1/4 ?" 1/2; 3/8 ?" 1/2; 1/2 ?" 3/4.
Supplied with:
1 pc. each reducer piece No. 649550: Size 1; 2; 4; 6