Dewalt 20V MAX Variable Speed Lithium-Ion Cordless 13 in. String Trimmer (Tool Only). 20V MAX 13 in. String Trimmer – DCST925. Line Pre-Wound in Spool. Cutting swath with 0.080 in. Gear drive transmission design that powers through overgrowth. Variable-speed trigger with high/low speed control gives you added power or extended runtime. Lightweight and ergonomic with a balanced design to help you move freely. Part of the 20V MAX system of tools. WHY OUR CUSTOMERS KEEP SHOPPING WITH US. SECURE & HASSLE FREE SHOPPING. We are available 7 days a week. All corded products are designed to work with North American 110/120V outlets only.