You need a tool that lets you measure sag repeatably without scratching anything. The right tool depends on your suspension type:

• Air shocks: you can usually measure on the shaft (many shocks already have markings).
• Coil shocks: the spring often blocks normal access, so you need a tool that works between coils.
• Forks: sag can be measured on the stanchion, but a simple dedicated fork sag tool is faster and more consistent.

Consistency matters more than fancy tools: same posture, same spot, same method.

“Suspension tools” usually means small tools used to set up or service forks and shocks without damaging shafts, seals, or plastic internals.

• Sag measurement tools
• Shaft-safe holding / clamping tools
• Air can / top cap tools (when needed)
• Seal installation aids
• Service helpers designed for specific dampers or air springs

Not always. Most DIY suspension tasks are low torque and precision-focused. The biggest risk is not “breaking the tool” it’s damaging the suspension part.

For occasional home mechanics, tool geometry and shaft safety often matter more than maximum durability.

Plastic tools can protect sensitive surfaces. It makes is possible to sell them at fair price as well.

• Plastic reduces scratch risk
• Many suspension operations are low torque
• Good fit is often more important than “hard material”

• Metal calipers or sharp tools near a shock shaft (scratch risk)
• Pliers directly on shafts or polished surfaces
• Improvised clamps that crush thin parts
• Over-torquing small plastic damper parts

If you’re unsure, assume the shaft surface is “no contact”.