Centers: 3 1/2", Overall Length: 4", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 4", Overall Length: 4-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 5", Overall Length: 5-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 6", Overall Length: 6-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 8", Overall Length: 8-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 10", Overall Length: 10-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Centers: 12", Overall Length: 12-1/2", Base: 1/2", Projection: 1 1/4" (Projection with optional plate: 1 5/16")Includes Mounting Hardware: #8-32 x 1"Optional Base plate included 
