DescriptionDiabolic Ultra-Lite GDH Profile Bolts M12 X 1.25 bolts. Fits Profile & Madera GDH Cranks only. Note: GDH Spindles use a 1/2″ diameter bolt instead of a 3/8″ bolt like most 48 spline cranks.  Material: Titanium Ti-6AL-4V (grade 5), annealed  Tensile Strength: 138,000psi Gun drilled hollow for weight savings  Weight: 18 grams a pair  Lifetime warranty to original owner  Sold in Pairs———————————————————————————————-Diabolic 3/8″ X 24 X 30mm Diabolic Grade 5 titanium spindle bolts. Fits all BMX Cranks that use a standard 19mm 48 spline spindle. Material: Ti-6AL-4V (grade 5), annealed Tensile Strength: 138,000psiLifetime warranty to original ownerSolid Titanium BoltComes in anodized colors including black Weight: 20 grams a pairSold in Pairs*Be sure to use anti seize compound on threads & a good 7mm allen wrench*