Studio : Park Publisher : Park Product Description Complete Lock-Block rotational-tension assembly for PRS-2, PRS-3, and PRS-4 ( OS model) repair stands. Includes: (1) 113S threaded lock block, (1) 114S unthreaded lock block, (1) 115S block retraction spring, (1) 109S handle retention roll-pin, (1) 111S handle arm, and (1) 110S handle knob. 0
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