Features: 1. Fitment - Fits for springs 3/4 inches to 1-1/16 inches, Briggs and Stratton, Clinton, Harley-Davidson, etc. 2. High Quality - This Small Engine Valve Spring Compressor has heavy-duty frame and screw for rigidity, manufactured from high quality materials,strong and sturdy. 3. Function - The Small Engine Valve Spring Compressor help you compresses valve springs for keeper removal without removing cylinder heads, make your work easier and more efficient. 4. Two Jaws Size - 23360 Lager jaw and23370 Small jaw. .