Type 91 VXL Chain 52 Drive Links. This high performance low profile chain is ideal for professional users, using lightweight chain saws in commercial operations such as tree surgery and pruning. Gauge 0.50 1.3mm. Fits various saws; ALPINA, BLACK AND DECKER, BOSCH, CHALLENGE XTREME, DOLMAR, ECHO, HITACHI, HOMELITE, HUSQVARNA, JOHN DEERE, JONSERED, LANDXCAPE, MCCULLOCH, RYOBI, STIHL. Dependant on manufacturer's specifications, current guide bar and chain.