Our 45 mm rotary cutter blades are made of high quality steel (-7). This material has a long service life and a long-lasting edge that cuts cleanly through mutiple layers of fabric at once. Perfect 45 Rotary Blades for sewing, quilting, patchworking and for all types of arts & crafts. Multi-Layer cutting of fabric, card, fleece, vinyl, paper, leather, cloth, felt, etc Our rotary blades Fits for , for , for , for and all 45mm rotary cutters. Each package has 15pcs 45mm rotary blades in a plastic storage box, oiled to prevent scratching and rust. Color: Silver Material: Metal Package Contents: 15 x Rotary Cutter Blade Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.