Designed to compress valve springs on overhead valve engines.

Includes two valve spring adapters, which fit valve spring retainers up to 1" (25 mm) and 1-3/16" (30 mm).

Unique, direct action compressor lever gives better visibility of valve spring retainers located in difficult access areas.

Jaw opening of 1-3/8" to 5-5/8" (35 mm to 142 mm); throat clearance of 5-7/8" (150 mm).