Adapter bits external serration Products nameVersionoutside-ØInside-Ømanufactureitem No.bit insertExternal mulitplicity tooth4.35mm2.50mmHorotec517580bit insertExternal mulitplicity tooth4.50mm3.15mmHorotec517581bit insertExternal mulitplicity tooth4.30mm "P3"3.30mmHorotec517582bit insertExternal mulitplicity tooth5.00mm "P27"3.60mmHorotec517583bit insertExternal mulitplicity tooth5.50mm "P39"3.80mmHorotec517584