U S Shop Tools is one of America's leading manufacturers of Chuck Jaws - Soft Jaws, Round Jaws and Hard Jaws. We are also a leading distributor of ER Collets, Straight Shank collet holders, Power Chucks and Lathe Bushings. WE ARE A REAL "BRICK AND MORTAR BUILDING" Manufacturer and distributor- not just an Internet based business - with over 50,000 sq ft of Manufacturing and warehousing space in Orange County CA and Warren, Mi.