FeinStarlock Carbide Segmented Saw Blade - Precise Tile Grout Removal, Plaster Cutting and Porous Concrete Work, Extra Thin Version, 2-15/16" Diameter, 3/64" Kerf - 63502125210

I need to remove old thinset mortar without creating a lot of dust the way an angle grinder would. This works pretty well in combination with a cold chisel and masonry hammer. The blades are expensive but you can get a lot of use out of each one by gradually rotating it.

The thin kerf is excellent. I'm using this to remove 1/16 inch grout between standard 4 inch ceramic tiles in a shower.The good: thinThe bad: carbide wears out quicklyNote: I thought I was getting starlock plus blades (the ones without the holes around the star), but regular starlock showed up (with the holes). I needed starlock so this was a welcome surprise.If you want to maximize life of these blades here's my advice:- Go slow, use your oscillating tool at the lowest speed- Do not apply too much pressure. This will burn up the edge of the carbide- Use the entire edge of the blade and don't focus on one spot too much- Use a mix of 50 percent isopropyl alcohol and water to cool the blade regularly during use. This will preserve the carbide- Use a fan to cool your oscillating tool or you will likely burn up the motor.With all the above tricks, I can remove about 60 linear feet of 1/16" grout per blade. Use that as a reference for your job.Not great considering the price, but there don't seem to be many options for blades this thin. I think if they were diamond abrasive it would last longer.

Worked great at cutting into the grout line and fiber cement board to remove a decorative mosaic previously installed that needs to be replaced.Could have used a grinder but I did not want to damage the existing tile. Tool worked perfectly and did not damage any of the tiles.This will also be my new go to for cleanup before grouting and cutting out tile leveling clips that are stuck in grout joint.

This is definitely a Starlock blade even though some of the photos show differently. It definitely is thinner than any other blade that I have found. It easily fits into 1/16" grout lines. The only thing that I don't like about it is that it is a carbide coated bland and it isn't as durable as a diamond coated blade. It dulls relatively quickly (starts dulling in about 60" of grout line) compared to a diamond blade not dulling in over 600" of grout line). I wish that they made it in a diamond coated blade.

The tiles in my shower are very close together. Whoever installed them did not leave enough room for grout. The grout needed to be removed and replaced and this tool was the perfect thickness to fit between my tiles. It ground the grout very well.

Worked really well for what I needed to do

The Fein star lock carbide blade made removing grout between tiles a snap. The thin kerf and semi circle shape made it very easy to get into the hard to access inside corners. I am very happy with the Fein blades they offer with the Fein multi tool.Dave Fritz

It’s durable and works as advertised.