1 / 3Park Tool MLP-1.2 Master Link Pliers, model 373-901
Park Tool MLP-1.2 Master Link Pliers are designed to open and close compatible bicycle-chain master links. Their shaped jaws are intended for 5-to-12-speed derailleur chains that use this type of link, but not every older or single-speed link design.
At a glance
- Shaped jaws are designed to open and close master links without driving out a chain rivet.
- The listing says the redesigned tips can help re-join stiff or corroded master links as well as split them.
- Listed compatibility covers 5-to-12-speed derailleur chains using a master link.
Often bought together
Pros and cons
Pros
- One tool is intended for both opening and closing compatible master links.
- The stated compatibility covers a broad range of derailleur-chain speeds.
Technical specifications
8 specifications| Brand | Park Tool |
|---|---|
| Model | 373-901 |
| Dimensions listed | 16.5L x 5.3W centimetres |
|---|---|
| Weight listed | 0.1 Pounds |
| Material listed | Metal |
|---|
| Colour | Blue |
|---|---|
| Grip type | Ergonomic |
| Compatible chains | 5-to-12-speed derailleur chains that use a master link. |
What to know before buying
- The listing says this tool will not install or remove master links with both pins attached to one plate and a side plate or spring clip. Those link styles are commonly found on older drivetrains or single-speed bicycles. Check the chain-link design before buying.
What’s in the box
Included- Chain lock pliers
Who is it for?
A good fit for
- Cyclists or workshop users maintaining 5-to-12-speed derailleur chains with compatible master links.
- Buyers who want a dedicated tool for opening and closing master links, including stiff or corroded examples.
Less suited to
- Owners of the side-plate or spring-clip master-link styles described in the listing, including many older or single-speed systems.
Customer reviews on Amazon
- 5 stars
82% 82% - 4 stars
14% 14% - 3 stars
2% 2% - 2 stars
0% 0% - 1 star
2% 2%
Aggregate ratings skew strongly towards the top end, though a small share are at the lowest star level. Without written feedback, the figures do not show what customers liked or disliked. They cannot establish how reliably the pliers work across different link designs, so the listed compatibility and exclusions remain important when deciding whether they suit your chain.
Frequently asked questions
Which chains are these pliers listed as compatible with?
The listing states compatibility with 5-to-12-speed derailleur chains that use a master link.
Can the MLP-1.2 handle every type of master link?
No. The listing excludes links with both pins attached to one plate and a side plate or spring clip, a style commonly found on older drivetrains or single-speed bicycles.
Can the tool close a master link as well as open it?
Yes. The stated operation is to squeeze the handles to open a link or pull the handles to close it. The listing also says the redesigned tips can re-join stiff or corroded links.
Alternative options
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Park Tool CT-5 - Mini Chain Brute Chain Tool Tool, Black/Silver | Park Tool CT-5 Compact Chain Tool for 5-12-Speed & 12-Speed Chains
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Oumers Bike Link Plier, Chain Plier Missing Link 2 in 1 Opener Closer Remover Bike Tool Compatible with All Speed Chains Repair
£6.99
Park Tool CC-2 Chain Checker Tool, Blue
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