About Park Tool 21oz Shop Hammer (HMR-4)
Park Tool’s versatile and durable shop hammer is a perfectly-balanced striking instrument built for a wide variety of shop uses, from removing press fit bottom bracket cups to installing star-fangled nuts. Features a precision-machined forged-steel striking face as well as a non-marring replaceable nylon mallet head. Fiberglass shaft with soft-touch grip handle.

Features
Weight: 880 g (31 oz.)

Head weight: 590 g (21 oz.)

Length: 345 mm (13.5″)

Steel striking face: 35 mm (1.38″) diameter

Nylon face: 43 mm (1.69″) diameter

Replaceable tip part #293

About Park Tool
Park Tool are the world’s largest bicycle tool manufacturer. Located in St. Paul Minnesota they have been designing and manufacturing bicycle specific tools since 1963. Their dedication to quality and innovation have gained them the reputation for producing the best bicycle tools in the world.