Includes Free Shipping. This master thread repair set includes 5 complete tool kits with 20 inserts per kit “10 each of short and long” for a total of 100 inserts. Thread Sizes= 1/4-28, 5/16-24, 3/8-24, 7/16-20, 1/2-20Master kit p/n 0020 (1/4-28x.380 / 1/4-28x.500) (5/16-24x.450 / 5/16-24x.620) (3/8-24x.520 / 3/8-24x.750) (7/16-20x.620 / 7/16-20x.870) (1/2-20x.650 / 1/2-20×1.00) See theTIME-SERT products pdffor more information on thread repair kits and inserts. Some are listed for certain applications on cars, trucks and motorcycles. The pdf is a partial application list so feel free to email or call if we can assist with your particular need. We also accept inquiries regarding our daily TIME-SERT specials. Remember TIME-SERT is recommended by leading car manufacturers like the General Motors Corporation. In fact TIME-SERT is GM’s only authorized repair for head bolt threads.