COMPACT SIZE 20mm x 34mm: COMPACT SIZE AND SHAPE (20mm DIAMETER X 34mm HEIGHT) TO FIT MOST TUNER WHEELS WITH SMALL LUG HOLES. LIGHTWEIGHT 36g: EACH NUT WEIGHT 36g, SMALLER SIZE THAN TYPICAL NUTS AT 60g, AT EACH WHEEL HELPS IMPROVE CAR DRIVING FUNCTION. COLD-FORGED 1008 STEEL: MADE BY COLD-FORGED 1008 STEEL WHICH ENABLES THE NUT TO BE MADE SMALLER AND LIGHTER, BUT STRENGTH TO MATCH OR EXCEED OTHER STANDARD NUT SPECS.