Crank spindle bolts, to suit many different cranks, but not all cranks.
19mm one piece usually suits 19mm 8 spline spindle sold as a pair
19mm 2 piece usually suit 19mm 48 spline spindle (not profile hollow spindle) sold as a pair
22mm one piece suits some 22mm spindles, thread size is M14 x 1 sold as a pair
22mm two piece suits some 22mm spindles, thread size is M15 x 1 sold individually
If you are unsure best bet is to bring a sample to the shop so we can match it up.