Heavy-Duty impact front-end service tool. Hits harder and straighter than a hammer, with no more misses or glancing blows. This tool puts the impact power where you need it for front-end service. Two easily interchangeable hardened steel forks. Use the 35939-01 (T39B-1) fork to separate shock absorber links and tie rods. Use the 35939 (T39B-2) fork on spindle support arms to remove ball joints without damaging other suspension parts. This product is.