OM490 MRO Bit Holder. MRO bit holders are made with high quality steel and are used throughout the aviation industry. With MRO bit holders, you get economy and flexibility. MRO bit holders feature quality, select raw materials and only high grade tool steel. Each MRO bit holder is manufactured to the tightest tolerances in the industry.

Closer tolerances also mean a better fit and less cam-out or stripping, which in turn keeps work areas free of damage and reduces incidence of bit failure and costly re-work.

This bit holder is equivalent to Apex Bit Holder 490.