Well finished, these flat-leg steel calipers lock with a partial turn of the large knurled disc. The knurled adjusting nut permits fine sizing adjustment (up to ±1/8"). A spring washer under the locking disc maintains leg tension when joint is unlocked.
Maximum opening is about 1/3 greater than size indicated.
Made in USA.
These product are not stocked at our retail stores, but can be ordered for pick-up at our stores.