Check the listing for details. Knife Maker's Center Line Scribe, Angle Block Scribe, 2X72 Knife Grinder Scribe. Condition: New. Listed at 59.99 USD. This is a New Knife Maker's Center Line Angle Block Scribe. These are used the same way you would use a height gauge. The body is made from a 2" X 2" X 2" Precision Angle Block. There is swivel block attached to the angle block with a spring loaded clamping lever handle. The swivel block is solid steel. It is 3/4" thick X 3/4" wide X 1-5/8" long and holds a massive carbide tipped height gauge tip via 4 set screws. You can place the swivel block to where it suits you best as the angle block has 2 holes. One in either corner. These are simple and easy to use to make a single or the dual lines many prefer. Just use the corner of the carbide tip the same as you would a height gauge. This scribe is solid steel, heavy and rugged. Made in The USA in a Small New Hampshire Shop.