This is a velcro handle for a choral folder.  

Print two of these dovetail end pieces which feature a slot for ¾ inch wide velcro strap.  You will need 25 inches of the Velcro One-Wrap or a similar product.

                                               I purchased this velcro wrap on Amazon.

I printed the pieces using PLA, 15% fill, 0.2 mm / layer.  You will need supports between the base and the dovetail.  I used organic supports which come off fairly easily with a putty knife.

These end pieces fit in my Choral sheet music holder

Lay the velcro - furry side against the folder and the two end pieces (dovetail-end-holder-velcro) at either end as shown.