Slice Safety, Never Rusts Finger-Friendly Lasts up to 11x Longer Than Steel, Pointed Tip, Fits in Seam Rippers and Craft Handles, 4 Pack Blades

I'm tired of buying cheap seam rippers. It suddenly become dull when i need it the most. These blades cost about half of one cheap seam ripper, which gives you 4 blades for the price of two cheap rippers. I used one on a silk pillowcase and it worked. The tip didn't pierce the fabric and was very sturdy in the holder. It will take a little practice using it with the holder i have and may need to order a different style. I recommend the entire line of handles and blades.

I bought the knife with the round-pointed one. They are OK, but don't under small stitches. This replacement with the sharp-point is really SHARP. it goes under the very small stitches and cut it with ease. It is made of ceramic and will not rust. This is my very handy tool now. The price is high, but may last for long time. The replacement blade doesn't come with instruction. You have to visit their site.

This tip, 10537, has a sharper tip than the 10536 blade that comes with the Slice handle. The original, rounded tip blade is too rounded to get under any but the largest stitches, but you would be hard pressed to find a way to draw blood or nick the fabric. The 10537 blade is sharp enough to get under most stitches, but it is sharp enough to poke yourself if you work at it. 10537 is not as sharp as the scary-sharp "surgical" seam rippers which have a razor-sharp surgical steel blade that can easily nick the fabric or cut your finger. Having ripped yards of seams with this blade, I see no sign of it getting duller; a 4-pack could be a lifetime supply. Blade fits Slice seam ripper handles and many other Slice handles, but the tang is too wide to fit the typical X-Acto handle. and does not have the keyhole slot to fit surgical handles. So if you don't have a Slice handle, you may need to get clever with a Dremel and/or epoxy to alter the handle; I haven't tried to cut the ceramic blade.

I really like these blades. They work well but the tips are very delicate and can break off, making it harder to cut threads cleanly.

Perfect for tight seams. Nice and sharp. Easy to use! I’ll never use the old standard seam ripper again.

Unfortunately, steel blades are definitely sharper and thinner, easier to slide under stitches and use as seam rippers, than these ceramic ones,

Perfect for my sewing. Nice perfect point !

Works like a charm

Effective and safe blades.

Not cheap but the quality is excellent. These cut threads brilliantly but when I caught my finger by accident, to my surprise, it didn’t cut me (I know that’s what supposed to happen). Although the longer blade is intended for cutting overlocking, it is also easy to use on any stitching because of the quite fine point. I have been taking apart some old items of clothing to make patterns from and the original blade is still perfectly good after several hours use so I have no reason to doubt their claim about longevity. The long handle makes it easy to hold, especially it you have big hands, I find the standard thread cutters to small and fiddly. The blades are quite expensive but if they last as long as claimed, they will work out fairly reasonable value for money. Their safety makes them very good value.