D'Addario PWAT-EXT-1 Single In-Line Machine Head 6-In-Line (Black)

D'Addario's PWAT-EXT-1 Auto Trim tuning machines reshape the string-change workflow by eliminating a familiar frustration: excess string trimming. Engineered by Ned Steinberger, these precision tuners automatically crop surplus winding as tension builds during restringing, removing the need for dedicated cutters. The 18:1 gear ratio worm construction delivers tuning stability that holds firm through aggressive bends and tremolo work, whilst the 6-in-line configuration suits any guitar with headstock–mounted tuning machines aligned vertically.

Each tuner houses a die-cast body with precision–machined bevel and worm gears, paired with individual string clamps that grip the string securely without requiring multiple wraps around the post. Insert the string into the clamp, tension it to pitch, and let the auto-trim mechanism shave away the surplus in one fluid motion. The design includes all mounting hardware and arrives in chrome, gold, or black finishes. Model PWAT-EXT-1BK ships as a complete six-piece set, ready to retrofit any compatible headstock.

Features

• Automatic string-trimming function eliminates need for external cutting tools
• 18:1 gear ratio precision ensures stable tuning under aggressive play
• Individual string clamps eliminate multiple wraps around tuning posts
• Die-cast housing with precision-machined bevel and worm gears
• 6-in-line configuration for single-side headstock machines
• Complete mounting hardware included with six-piece set
• Available finishes: Chrome, Gold, and Black
• Ned Steinberger design philosophy for streamlined restringing