Product details:

COMP cams 4901: Dial indicator stand, Aluminum, Blue anodized, Accepts 7/16 in. and 1/2 in. Head bolts, Each Comp cams offers two styles of cam checking fixtures: heads on and heads off, to suit your automotive needs. The cylinder heads off-engine fixture was designed to maintain proper geometry, while holding a dial indicator (not included) and a 5 in. extension (included) precisely over the lifters. These professional quality tools are much easier to use and more precise than using a magnetic indicator base when degreeing a cam. These multi-functional tools can also be used to check rocker ratio, piston to valve clearance, and even crankshaft end play.