Grover Musical Products is an American company based in Cleveland, Ohio that designs, imports, and distributes tuning machines and hardware for stringed instruments including guitars, bass guitars, banjos, mandolins, ukuleles, and dulcimers. The company traces its roots to 1922 when Henry and Julius Grossman founded Gross-man Brothers Music Company in Cleveland, and adopted the Grover name in 1952 after acquiring Grover Accessories Co. (formerly A. D. Grover & Son).

The brand is best known for its Rotomatic tuning machines, a staple since the 1960s featuring cast gear housings, sealed lubrication, and adjustable tension knobs, along with locking versions offered in 18:1 gear ratios. Other well-known product lines include the vintage-style Sta-Tite open-gear tuners and the 102 Series 3+3 Rotomatics commonly used as aftermarket upgrades on electric and acoustic guitars.

Grover tuners are widely distributed through major retailers like Sweetwater, Stewart-MacDonald, Allparts, and Reverb, and are factory-installed on a variety of production guitars. The parent company also operates related music-industry brands including Trophy Music Co., Clevelander Drum Co., Attack Drumheads, and Wuhan Cymbals & Gongs.

Grover has 11 products cataloged on Equipboard, including Tuning Machine Heads, Drumsticks, Mallets & Brushes, and Whistles. Their gear is featured by 5 artists, with the strongest followings in Rock, Pop, and Metal. Notable users include Wilbur Soot, Robin Finck, and Paul Landers.