V20 String Trimmer (Tool Only)

What does the CMCST901B include, and what does a buyer still need?

The CMCST901B ships as a bare tool only — no battery or charger included. It is right for V20 platform users who already own compatible batteries. A 4Ah pack is recommended for the rated runtime; smaller 2Ah batteries work but exhaust faster on this trimmer.

What does the 2-speed setting on the CMCST901B let you do?

Two speed settings give you control over string speed — lower speed for light trimming near garden beds and fences where precision matters, higher speed for thicker grass and taller growth. This is useful for avoiding accidental damage to plants or structures where full-throttle speed would be excessive.

Craftsman mentions up to 63 minutes of runtime for this model. What conditions does that assume?

The 63-minute figure is based on Craftsman's internal test conditions with a specific battery capacity. Actual runtime varies by grass thickness, trimmer line condition, speed setting, and battery state. Expect less on thicker growth or at high speed.

How does the CMCST901B compare to the 10-inch CMCST915 series?

The CMCST901 is a larger-format trimmer with a 13-inch cutting swath; the CMCST915 series cuts a 10-inch swath. The wider swath covers more area per pass and is better suited for medium-to-large yard trimming. The 10-inch 915 series works well for smaller yards and tight spaces.