15 May 2018 in Clients Training, Powerlifting Pin squats for Claire 10/5/18 A post shared by Aaron Bolton (@abspersonaltraining) on May 10, 2018 at 2:46am PDT After hitting a PB in the back squat yesterday, it was good to know Claire could still grind out 3×3 at 67kg pin squat and manage a 105kg deadlift before finishing with 4×4 at 92kg back off sets.