This is the Forester brand Full Chisel chainsaw chain loop for a 20" bar. This chain is 72 drive links (count both cutters and non-cutters). This chain is 3/8" pitch, .050 gauge. This is NOT safety chain, so the risk of kickback is higher. Please be cautious and comfortable using a saw before you purchase. It is advised to use all available safety protection, chaps, eye protection, hearing protection, and a face sheild. Bottom line: this stuff REALLY cuts fast. This chain is for some serious cutting! It fits a 20 inch bar, and has full chisel teeth. This type of chain is intended for professionals and those with experience operating chainsaws. This is not a safety chain, and you will notice a defined difference in your cut rate when you switch over. Removing more wood with each passing tooth not only saves time, but it also saves fuel and reduces wear on the chain and your body. This chain fits a wide variety of chainsaws brands. It features the most common of all pitch/gauge combinations (3/8" and .050") but does not fit every model. To make sure it will fit yours, first check that your saw uses 3/8" pitch chains. You can find this in the manual, or take your old chain and measure the distance between three consecutive drive links (the rivets that keep the chain together) and then divide that measurement by two. The result should be 3/8". If it is, then ensure that your 20 inch bar uses .050" gauge chains. This should be printed on the bar, but you can also check the part of your old chain that rides in the bar's groove, which should measure .050". As always when operating a chainsaw, make sure you have adequate training for the equipment you will be using, and make sure to wear safety gear. FORESTER makes a full line of gear to keep you safe while cutting