Original Makita 345187-4 Guide Washer — precision-machined guide washer (MPN 345187-4) designed for Makita rotary hammers to restore correct axial alignment in the drive/guide assembly.

Made from durable, wear-resistant steel and finished for a snug factory fit, this guide washer reduces play and vibration to help maintain smooth drilling and hammering performance under jobsite conditions.

Fits many Makita rotary-hammer models including HR2450/HR2811 and DHR164/DHR165 (and a wide range of BHR/DHR/HR series machines), allowing straightforward like-for-like replacement during routine service or repair.

This is a genuine Makita replacement part built to original specifications — a small, inexpensive component that protects more costly moving parts and keeps your tool operating as intended. Makita parts.