Double-Ended Spark Plug Thread Chaser Or Rethreading Tool For Spark Plug Installation in 10mm, 12mm, 14mm and 18mm, 2 Pack T1A-E1082 GREAT VALUE - Grease and oil buildup all take a toll on clean spark plug thread holes. And thats an important part of keeping your vehicle running smoothly! Remove all of that crud and prepare your car or truck for spark plugs with the TruBuilt 1 Automotive Double-Ended Thread Chaser set for better engine performance. PROFESSIONAL GRADE CONSTRUCTION - The T1A Double-Ended Thread Chaser was made with high-grade steel and features a rubber neoprene ring to hold the thread chaser snugly in place. Use this specialty automotive tool (just like those found in professional auto mechanics garages) for years of reliable application - even through heavy-duty jobs! HIGHEST-QUALITY PART - Engineered to outlast other cylinder head rethreader tools, the T1A Double-Ended Thread Chaser set was made to stand tough. Designed for everyday strength and durability in YOUR garage, or on the race track. COMPLETE SET - Each T1A Double-Ended Thread Chaser set includes 14mm and 18mm sides for spark plug threads. Contains M10 x 1.0/M12 x 1.25, M14 x 1.5/M18 x 1.5 for cleaning and re-threading damaged spark plug ports. BUY WITH CONFIDENCE - Rest assured with your purchase. Every T1A Double-Ended Thread Chaser is backed by our industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the T1A No Questions Asked, 30-Day Money Back Guarantee!! As with all T1A tools, you are covered - TruBuilt to Last.