Adjustable Pinch Block 3"x4"

Name: Adjustable Pinch Block 3"x4"
Brand: Arm Assassin
Rating: 5.0 (4 reviews)

The Adjustable Pinch Block 3”x4” is a plate-loadable pinch grip trainer from Arm Assassin, a small U.S. grip-sport and arm-wrestling equipment shop. The pinch width converts between 3” and 4” by moving the eye bolt to the other side of the block, and it’s offered in a 1-handed (5.5”) or 2-handed (9”) version, with a loading pin for adding plates.

GymRadar’s four written user reviews are consistently positive, describing it as a demanding pinch trainer that’s tough from the first pull, easy to load progressively heavier, and “simple and no frills but well made.” The manufacturer doesn’t publish material or weight specs, and no editorial or video review of this exact accessory has surfaced independently — the record is thin but positive.

Loading	plate-loadable via included loading pin
Pinch width	3" or 4" (adjustable, eye bolt repositions to switch)
Handle length	1-Handed: 5.5"; 2-Handed: 9" (sold separately)

How it compares

	Adjustable Pinch Block 3"x4"	Rice Bucket - Custom/DIY	The Big PP 2.0	Napalm Handles
GymRadar rating	5.0/5	5.0/5	5.0/5	5.0/5
Price	$35.00			$15.00
Loading	plate-loadable via included loading pin
Pinch width	3" or 4" (adjustable, eye bolt repositions to switch)
Handle length	1-Handed: 5.5"; 2-Handed: 9" (sold separately)

5.0/5 · 4 GymRadar reviews

Reviews by source

Expert

5.0/5

4 reviews

Arm Assassin’s Adjustable Pinch Block 3”x4” is a plate-loadable pinch grip trainer that swaps between a 3” and 4” pinch width by moving the eye bolt to the other side of the block. Functionality is the standout dimension — four independent gym owners on GymRadar consistently describe it as a demanding, “legit grip killer” that’s tough from the first pull and easy to load progressively heavier for structured pinch training. Independent coverage is the weakest dimension: the only outside evaluation is a small, four-review GymRadar sample, with no editorial or video review to corroborate it, and the manufacturer’s own page publishes no material or weight specs. For grip-sport and arm-wrestling training it reads as a well-regarded, no-frills tool, but the record is thin.

+Functionality: reviewers call it a "legit grip killer" that "feels tough right away" and is easy to load progressively heavier over time (GymRadar review — Wberry577)
+Versatility: the pinch width converts between 3" and 4" by moving the eye bolt to the other side of the block (GymRadar review — Big Marc)
+Versatility: also sold in 1-handed (5.5") and 2-handed (9") configurations, and as part of a bundled kit with the 2"x5" width (manufacturer product page)
+Build quality: described as "simple and no frills but well made" (GymRadar review — Big Marc)
+Value: $35 direct from the manufacturer for a plate-loadable specialty grip tool (manufacturer product page)

−Durability: no long-term wear reports turned up — the four available reviews are all first-use impressions, not extended-use accounts (knowledge base)
−Functionality: the manufacturer's page gives no material, weight, or gauge specs, leaving construction details unconfirmed beyond user reports (manufacturer product page)
−Value: independent coverage is limited to a four-review GymRadar sample, with no editorial or YouTube review to corroborate the rating (knowledge base)

$35.00

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