The Half-Blind Dovetail Template is designed for one size of bit. The pitch is fixed but each Template has two slightly different pitches accessible by just turning it round. It will work with drawers unto.

Having the MB3, you will be able to make the first 45degree cuts of a Secret or Mitred Dovetail, and then using a similar technique to half-blind dovetails, you complete the joint with the dovetails concealed inside the mitres. Suitable for 12-6 bit making half blind dovetails for drawers to to 190mm deep.