InkOwl Toner Refill Kit for SAMSUNG CLT-K504S (Black, 1-Pack, with reset chip) Includes 1 bottle of Ink Owl premium formulation toner, 1 spout for easy pouring, 1 stick-on reset chip for easy installation without cutting, easy-seal aluminum tape, along with detailed, graphic instructions. For the proper functioning of the refilled cartridge, we have included a replacement reset chip which is essential for proper printer function. To refill this cartridge model, you'll need to pierce holes. To do so, it is highly recommended that you use a laser cartridge holemaking tool designed for this purpose. The use of any other tool, including a drill, is not recommended to avoid damaging sensitive internal components. You can then use the provided easy-seal tape to seal the holes. To get the tool: http://www.amazon.com/dp/B008J4P5JU Our instructions will guide you step-by-step through the entire refill process including replacing the chip. Includes 70g of toner powder for 2500 pages at 5% page coverage. This is the same yield as the original cartridge.