This listing is for cemented carbide inserts, they are K10/YG6 fine grained cemented carbide for a keener edge and longer time between sharpenings.  

They are supplied in two sizes off the shelf, though if you have any specific requirements regarding dimensions or nose radius please send a message to discuss them.

The 20x30x2mm inserts are good for general to finish scraping.

The 30x30x2mm with a 140mm nose radius are ideal for quickly hogging out material, or for working on larger pieces.

Scraper handles for these inserts can be purchased here You can use a 30x30mm insert with the standard scraper handles that I supply.

The inserts will still need sharpening and honing, this can be done with a regular set of aluminium oxide wheels, but for the best results finishing should be done with a diamond wheel and/or hone. 
As standard they don't come with a rake ground into the nose as this depends on the material you're scraping, the angle of the scraper and the radius ground into the insert.

Insert length is +/- 0.5mm

If you don't see the size you need then send me a message and i'll do my best to supply what you need.