Welcome to Defender Canada! 
Barton TUPHblox Cam Item # 1400164
Description
The TUPHblox Cams are engineered cams with stainless springs, and the cams are riveted in place with stainless steel pins. These provide good holding power for ropes. These are available with and without fairleads.
Specifications:
- Max Rope Diameter:1/4 – 1/2" (6 - 12 mm)
- Holding Power: 507 lbs (230 kg)
- Max Rope Diameter: 3/8 – 9/16" (10 - 14 mm)
- Holding Power: 573 lbs (260 kg)