Jumbo Omni-Rigging Block 4.5

The Jumbo Omni-Rigging Block 4.5" from Rock Exotica is the largest and most robust block in the Omni series, combining a swivel and block in one tool. With a working load limit (WLL) of 2720 kg (6000 lbf) and a unique side plate that opens without detaching from the anchor, it is perfect for heavy rigging in tree care, industry, and tower climbing.

This Jumbo Omni-Rigging Block (art. no. MHP58) features a large 11.43 cm (4.5 inch) sheave that handles ropes from 9.5 mm to 19 mm (3/8" - 3/4"). The integrated swivel automatically orientates the block to minimize twisting and reduce gain during lifting, while the patented side plate with a two-stage locking mechanism allows for one-handed rope installation and removal – even when the block is attached to the anchor. Made in the USA with CNC-machined aluminum for optimal strength-to-weight ratio (design factor 5:1) and fully ASME B30-certified for safe lifting.

Technical Specifications

• Article No: MHP58
• Sheave Diameter: 4.5 inches (11.43 cm)
• Rope Diameter: 9.5–19 mm (3/8"–3/4")
• Working Load Limit (WLL): 2720 kg (6000 lbf)
• Weight: 2.65 kg (5.8 lbs)
• Design Factor: 5:1
• Certification: ASME B30 compliant
• Country of Manufacture: USA

Features

• Install and remove rope while the block is attached to the anchor
• Side plate with two-stage, double-catch safety lock
• Integrated swivel orientates the block and reduces gain
• One-handed operation for attachment, rope installation, and removal
• CNC-machined for maximum strength and minimal weight
• Prusik-minding side plate for friction control
• Push-button for easy opening of the side plate

Ideal for high-lift systems with capstan winches, heavy industrial rigging, or arborist work where space and weight are critical. The short length of the block eliminates the need for additional carabiners, creating more compact and safer rigging systems.