The Milwaukee 28-14-7004 Upper Guard Gear Case helps protect and support the upper gear components within compatible power tools. This replacement case encloses the gear assembly and helps shield internal parts from dust, debris, and accidental contact during operation. A properly fitted gear case helps maintain component positioning and supports reliable tool performance. Replacing a... https://www.wholetoolbox.com/milwaukee-28-14-7004-upper-guard-gear-case/28-14-7004.html