Had fork calipers, then had fork wear gauge, then I did CFTS inspectors course & was told we should be using Vernier caliper to measure fork wear.
FB chain gauge to measure the stretch & vernier again for measuring the disc height wear.
As for adjusting the chain's, I find ratchet spanner's make the job a lot easier & quicker, I have 24mm & 30mm for these job's.
Some truck I look after chain's are adjusted 10mm of the floor with forks level, other trucks I look after due to the poor design of the mast it's impossible to adjust the chains to get the forks of the floor & even the manufacturer in the service manual points this out as not possible.
I just use a light coating forktruck chain spray.
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