Better Materials:

High-strength aluminum alloy reinforced line advance button. We also use a superior grade of nylon when making our structural and working components. A material strengthened on the molecular level by an elastic formula designed to distribute impact force. We call it Extended Wear Nylon, a costlier raw material you will not find in any OEM trimmer head or other after-market trimmer. Other trimmer heads are made to reach a price point. Hammerheads are built to last. Hammerhead performance replacement trimmer heads withstand higher levels of impact stress, longer terms of abrasive wear 500 times beyond ISO shock test standards

Better Fit:

Each part in a Hammerhead measures within specifications of tenths of millimeters. Let’s face it, taking apart and putting your trimmer head back together shouldn’t be a struggle. With Hammerhead’s high standards at the factory — all parts slide together smoothly the first time and the 10,000th time.

Better Design:

Take the parts that fail and make them better. Hammerhead performance trimmer heads bolt to a billet aluminum center arbor. NO WOBBLE. While all other replacement trimmer heads provide a universal “bag of bolts” and ask you to pick out one that fits okay. Hammerhead has a large center arbor that is friction fitted and balance checked at the factory for an accurate and smooth spin. One specifically sized to your trimmer’s receiving bolt.
A leading cause of failure in a trimmer head is early wear in the advancement mechanism due to debris interference. Hammerhead’s solid, overlapping interior walls interlock to block foreign matter from entering.

Lifetime Replacement Coverage:

Every Hammerhead Performance Trimmer Head is designed and manufactured to give the user the longest performance possible from a trimmer head. All Hammerhead Performance Trimmer Heads are warrantied for one full year against manufacturers defects. Please review wear indicators on face of trimmer head for wear. When inevitable wear-out occurs each model of Hammerhead Performance Trimmer Heads has low-cost lifetime part swap-out available – through LIFETIME REPLACEMENT COVERAGE.