Precise Sine-Plate 6"x 6"x 2" 

Features:

• Made of quality steel, hardened to 55-62 RC.
• Tapped holes 1/4"-20 in top.
• Minute angle step 0.200 built into the front gage block roll - eliminates steps in the base plate.
• Two end rails and one locking strap included.
• Center of distance of rolls with 0.0001"
• 0-60° capacity.