Original DeWalt selector (part N190510) — a molded gear/selector that engages the gearbox to switch modes on compatible DeWalt rotary hammers; designed to replace a broken or worn selector and restore smooth gear changes and reliable operation.

Fits a range of DeWalt cordless hammer/rotary-hammer models including DCH243, DCH253, DCH254, DCH273, DCH274, DCH363 and DCH364.

Compact replacement dimensions are approximately 44 × 39 × 24 mm (approx.; listed as ~1.75 × 1.55 × 0.95 inches), making it a direct drop-in for the selector location on the listed models.

Sold as the original DeWalt selector part N190510 — a durable molded component that snaps into the selector assembly so you can quickly restore your tool without replacing larger assemblies.

If you need a single part to fix the gear-change on your hammer, this genuine DeWalt selector is the direct replacement to keep your tool working — a small, specific repair part among power tool parts that saves the rest of the tool from unnecessary replacement.