My rack has 1" holes. can still use this product?

Technically, yes. As long as you don’t mind some wiggling with the attachments. Could always place spacers to make a tighter fit to your preference. Hope this helps !

Can you attach the titan T3 or REP PR4000 pulley system to it?

Just get a REP PR5000. You won’t regret it. Compatible with Rogue Monster accessories. Note REP crossmember are 41” (ie pullup bar) and Rogue are 43”.

Will these fit on a Marcy SM-8117 half cage to replace 9 inch safety catches?

I am not familiar with the Macy SM-8117 half cage. However, I do not think these will properly fit your rack, since the Signature Safety catches are designed for 3" x 3" square uprights that accepts a 5/8" pin.

ASIN	B09LWZPWVP
Best Sellers Rank	242,396 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 33 in Power Cages
Brand	Signature Fitness
Brand Name	Signature Fitness
Country of Origin	China
Customer Reviews	4.3 out of 5 stars 324 Reviews
Frame Type	Rectangular Frame
Included Components	Spotter Arms
Item Dimensions D x W x H	7.6D x 7.6W x 7.6H centimetres
Item Type Name	Spotter Arms
Item Weight	7.03 kg
Item weight	7.03 kg
Manufacturer	Signature Fitness
Material	Alloy Steel
Number Of Racks	1
Number of racks	1
Product dimensions	7.6D x 7.6W x 7.6H centimetres
Style	Spotter Arms
UPC	850027698113
Weight Capacity Maximum	0.5 Kilograms

SF-3 Power Squat Cage Capacity 7.5 x 7.5 cm with J-Hooks and Safety Straps, Other Optional Accessories

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