The CHATILLON TD5 Series mechanical dynamometer may be used as a weighing tensiometer or crane scale. This precision weighing instrument features an easy-to-read 5-inch (127 mm) dial face with shatter-resistant dial cover in a strong aluminum housing. Available with pound or kilogram dial face, the TD5 Series accuracy is better than 1% of full scale. A manually engaged clutch “freezes” the pointer at is maximum reading for exact reading of peak weight. Needle bearings in shackles prevent brinneling under heavy loads and eliminate shackle misalignment. Mechanism sealed against dust and dirt. Oiling not required. Dynamometer is supplied with a Certificate of Calibration with Data traceable to NIST.