The anvil attaches to the opposite blade of your caliper when utilizing the Hornady Lock-N-Load Headspace Comparator, supplying a large surface area for case heads and bullets to rest, making ogive and headspace measurements easier to obtain.
Specifications:

Type
Caliber	Multi-Caliber
Size
Quantity
Weight
Function	Measure Cases
Compatible With	Lock-N-Load Gauges
Material
Includes
Capacity
Media Capacity
Finish
Grain
Media Type
Micrometer Type