Air passages for pneumatic tools

A portable pneumatic power tool comprising a housing, a rotary pneumatic motor in said housing, a handle portion extending from one side of said housing, passage means for air flow through said handle portion into said housing for providing operating fluid to said motor and for conducting exhaust fluid therefrom, said passage means being a single passage for at least a portion of the distance inwardly from the end of said handle remote from said housing, and insert means disposed within said single passage, said insert means including:

• (a) muffler means having an opening extending therethrough;
• and
• (b) hose adapter means extending through the opening in said muffler means for engagement with said handle means to hold said insert means in said single passage.