12 or 16 outer square edges suitable for nominal size 12.5 (1/2") sockets, 2 female square adapters for ratchets, sliding handle, extensions, etc., Powerful magnet allows secure attachment of the rail to metal objects , Additional holes in the strip allow mounting to non-metallic objects and walls, The inserts are securely locked in place by the ball in the square by rotating them through 90°, By rotating 90° in the opposite direction the templates are released and can be removed, Delivery without tools
