InkOwl Toner Refill Kit for SAMSUNG CLT-506 series (4-Pack, with reset chips) Includes 4 bottles of Ink Owl premium formulation toner, 4 spouts for easy pouring, 4 stick-on reset chips 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 165g of black toner powder for a full 6000 pages of black and 120g of each color for 3500 pages in color (at 5% page coverage). This is the same yield as the original high-yield cartridges.