GM 4 Button Prox 4B4 (HYQ1AA) -by Ilco 1981-Mercury-Monarch This cylinder comes keyed 5-pin

This cylinder comes keyed 5-pin (SC8) but can have a 6th pin (SC9) added

this OEM Uncut Transponder Key is a valuable addition to any locksmith's or key cutter's collection

The kit also includes "T" pins for "F" series locks and D/Bolt Cap Pins and Springs

keyed-randomly

GM 4 Button Prox 4B4 (HYQ1AA) -by Ilco 1981-Mercury-Monarch This cylinder comes keyed 5-pinExperience precision and reliability with the GM 4 Button Prox 4B4 key blank by Ilco. Made from high quality materials, this key blank is perfect for locksmiths and professionals seeking precision in key cutting and duplication. Simply add it to your key blank supplies and see the results in your locksmith services.