[Multipurpose Use] - Suitable for many models of chainsaws, such as 029, 039 Chainsaws,And other chainsaws or other mechanical parts that are also suitable for M8 to M10 specifications. [Durable Guide Bar Studs & Bar Nuts] - The screw and nut made of manganese steel, have high strength and hardness, wear resistance, and can withstand greater impact and wear. [Size & Package] - Guide Bar studs total length is 42mm/1.65in, the M8 to M10 size is normal size. The package contains 2 set of Chainsaw Guide Bar Studs & M8 Nuts. [Advantage] - Chainsaw Guide Bar Studs & Bar Nuts can be used to replace these part numbers 1127 664 2405, 1127 664 2400, 0000 955 0801. [Attention] - Before purchasing, please confirm that the size of the required part is consistent with the size of this product to ensure that it fits your saw chain.