BMX crank spindle HOLLOW bolts - these fit regular spindle Profile cranks. * Size: 3/8" X 24T X 1" (because of the flat head, 1" in this case is also the overall length of the bolt) * Head is 0.78" in diameter. * Comes with a pair of silver aluminum alloy concave washers (outer diameter of the washer is 20.5mm) * Color/Finish: NATURAL (silver) * Material: TITANIUM * Grade 5 (6AL-4V) * Weight: 8 grams per bolt (total weight of the two bolts and two washers is 18 grams). This is HALF the weight of regular steel bolts. * TORQUE TO MAXIMUM 23 ft-lbs (be sure your professional installer knows this is the maximum torque) * Will NOT fit GDH spindles. PLEASE MEASURE BFORE ORDERING. SOLD IN PAIRS