INCLUDES: (1) Bar & (4) Chains. New Copperhead 20 PRO bar with replaceable sprocket tip. Bar replaces OEM Husqvarna: 596687272 / HT280-72 (small mount). 4- PACK – 3/8 Pitch /. 050 Gauge / 72 Drive Link Chains are compatible with HUSQVARNA X-Cut Full Skip – C83-72. These chains also compatible with 20 STIHL 33RSF-72 / 3676 005 0072. Full skip chains – Full skip or “skip tooth” chains have 2 tie straps between each chisel instead of just one. The less chisels reduces engine strain and increases chip flow efficiency which leads to a faster cut. It also takes less time to sharpen a full skip chain. Requires 7/32 round file to sharpen. These chains are full chisel, professional chains. They do not have any anti-kickback bumper links and are made for users with experience and specialized training in dealing with kickback. We are happy to substitute these chains out for chains with reduced kickback potential for no additional cost. Please message us if you have any questions. Fits HUSQVARNA 455 RANCHER. Bar and chains are made from 100% imported German Steel. Thank you for supporting our small business!