Milwaukee Tool 2521-21HO 12V Cordless Circular Saw M12

Product Description

The MILWAUKEE TOOL 2521-21HO is a cordless circular saw built on the M12 FUEL platform, designed for cutting tasks in tight spaces where a full-size saw is impractical. It runs on a 12-volt lithium-ion battery system and accepts a 5-3/8 inch blade, delivering 3,850 RPM at the spindle. The sidewinder gear drive keeps the form factor compact while maintaining enough power for common framing, finish, and trim cuts. This kit ships with a battery, charger, blade, blade wrench, vacuum adapter, and bag — everything a technician or installer needs to put it to work immediately.

This saw is suited for residential and light commercial installation work, including mechanical room rough-ins, panel framing, decking, and material prep on the jobsite. The left-blade orientation improves sightlines over the cut line for right-handed operators. At 1-15/16 inches depth of cut at 90 degrees and 1-3/8 inches at 45 degrees, it handles standard dimensional lumber and sheet goods up to its rated capacity. Trades that commonly deploy a compact saw in this class include HVAC installers, electricians, and general contractors working in confined areas.

Key Features

• M12 FUEL platform: 12-volt lithium-ion, compatible with the M12 battery ecosystem
• 3,850 RPM no-load speed with sidewinder gear drive for a compact profile
• 5-3/8 inch blade diameter with a 10 mm round arbor hole
• Maximum depth of cut 1-15/16 inches at 90 degrees and 1-3/8 inches at 45 degrees
• Left-blade configuration for improved cut-line visibility
• Kit includes M12 REDLITHIUM XC HO5.0 battery pack, charger, blade, blade wrench, vacuum adapter, and carrying bag

Compatibility

Compatible with the Milwaukee M12 battery system. Kit includes one M12 REDLITHIUM XC HO5.0 battery pack and one M12 charger. Accepts 5-3/8 inch blades with a 10 mm round arbor.

Installation Notes

Remove the battery pack before changing blades or making bevel adjustments. Use the included blade wrench to secure the arbor bolt to the correct snug fit — do not overtighten. Follow applicable jobsite safety codes and always confirm blade guards move freely before operating. Disconnect power sources in the work area as required by OSHA and local codes before beginning any cutting near energized systems.