SECURE HIGH-TORQUE BIT RETENTION FOR INDUSTRIAL DRILLINGWhen operating high-capacity 3/4" chucks in heavy-duty drilling applications, the mechanical integrity of your bit seat is paramount. This Milwaukee replacement chuck key is engineered to provide the precise leverage required to fully engage the jaws of industrial-grade chucks, preventing bit slippage and ensuring consistent power transfer during high-torque operations. Designed as a direct replacement for the K4 series, this key features a precision-machined pilot and gear profile that minimizes wear on the chuck gear, maximizing the service life of your equipment and ensuring professional-grade ROI on the jobsite. / Universal compatibility with Milwaukee 3/4" capacity chuck models 48-66-2000, 48-66-2040, 48-66-2080, and 48-66-2085. / Precision-engineered 3/8" pilot diameter ensures a snug fit and prevents rounding of the chuck socket. / High-strength steel construction provides the durability needed for repeated high-leverage tightening. / Designed for use with the 48-66-4020 key holder for secure attachment to the tool cord set, preventing jobsite loss. TECHNICAL SPECIFICATIONS Chuck Capacity 3/4 in. Pilot Diameter 3/8 in. Key Series K4 Material Heavy-Duty Steel Compatible Chucks 48-66-2000, 48-66-2040, 48-66-2080, 48-66-2085 Weight 0.4 lbs. WHAT'S IN THE BOX(1) Milwaukee 3/4" Chuck Key (48-66-3160)
