Precision-built for 3×3 uprights with 1-inch holes Knurled grip handles on the outer end for steady setup and removal UHMW liners protect your barbell knurling Grooved end pin eliminates wobble Six 1-inch holes on each side for bolting attachments like Dip Handle Bars Quantity: Sold in pairs Upright Size: 3x3 Pin Size: 1-inch Dimensions: 6 in (W) × 23.5 in (D) × 9.5 in (H) Weight: 18.7 lb each