No tools needed. Easy snap together insulation. We recommend sew-on Grommet Tape to aid in placement Up to 3/32" fabric thickness, professional grommets used by drapery workrooms Plastic grommets for drapery, curtains, pillows, shower curtains and craft projects Fashionable, affordable and stronger than craft grommets Brushed Antique Brass Professional Home Decor Plastic Grommets for fast and easy decorating pillows, drapery, hand bags and purses. Use our Grommet tape for spacing and support when using #10 grommets. Eight grommets to a yard of tape. 9 Beautiful colors, 8 in package, 1 3/8 Inches ID, 2 1/8 Inches OD, Fits up to 1 1/4 Inch Rod