These narrow, pointed-tip seam ripper blades are ideal for opening the initial stitches in a seam, to slide between very narrow stitches, or to get into other tight spaces. They feature the Slice® finger-friendly® edge, which cuts effectively but is safe to the touch (lowering injuries) and last up to 11 times longer than metal blades. Because we use 100% zirconium oxide, these blades are also non-conducting, non-magnetic, chemically inert, and will never rust. Enjoy precision and accuracy with the SPG10537 blades. Four blades per pack.