Choice of 3 Sizes:

• 4.0mm 5/32" (Part No: 091/02) to fit saw with a1/4 pitch chain or 3/8s low profile chain.
• 4.8mm 3/16" (Part No: 091/01) to fit saw with a .325 pitch chain.
• 5.5mm 7/32" (Part No: 091/03) to fit saw with a 3/8 pitch chain.