This is a Engine Test Stand for Engines from .049 up to 2.5 cubic inches. This All Aluminum Test Stand is used to Break-In or Test Engines. FEATURES: All Aluminum Adjustable Test Stand that Will Fit Most Engines. The Mounts use 3/16" Nuts to Lock the Mount and Engine Into Place. The Engine Mounts Slide Easily to Accept Different Sized Engines. INCLUDES: One All Aluminum Adjustable Engine Test Stand Four machine screws gab6/9/94 ir/jl