Synergee J-Hooks for Power and Squat Racks. 2x3 J-Cups Designed for 1” or 5/8 Hole. J-Hooks for Power Lifting, Squats and Presses. Sold in Pairs., Power Cages - Canada

Here's another Fitness Reality 810xlt turned into a 6 post rack

SYL Fitness J-Hooks for 2x2 Power Rack with 1 Hole, Barbell Holder/Squat Rack Accessories J Cups in Power Cages.

SYL Fitness 2x2 J-Hooks Power Rack Attachment Barbell Holder/Squat Rack Accessories J Cups, Pin Dia Available in 1, 1/2 and 3/4

Here's another Fitness Reality 810xlt turned into a 6 post rack with

Synergee Power and Squat Rack Attachment 2x3 J-Cups Designed for 5

Synergee Power and Squat Rack Attachment 2x2 J-Cups Designed

Kipika J-Hooks for 2 x 2 Power Rack with 1 Hole

J-Hooks Set 2 x 2 inch

Round Sandwich J-Cups, REP Fitness

Synergee Squat Rack - V2 and V3 — Competitors Outlet