Hi-Tech 1221s Internal / External Snap Ring Pliers Set W/Replaceable Tips

Hi-Tech 1221-S Convertible Internal/External Snap Ring Pliers Set with Replaceable Tips, Heavy-Duty Reversible Jaw Mechanism, Includes 5 Pairs of Tips + Allen Wrench, UPC 763279122155 (US Patents 4,280,265 & 4,476,750)

Condition: New, with shelf wear on case/packaging; complete set with pliers, 5 pairs of tips, and Allen wrench; unused.

This Hi-Tech 1221-S is a professional, convertible snap ring pliers set that switches quickly between internal (retaining rings inside bores) and external (rings on shafts). A robust pivot and detent mechanism (covered by US Pat. 4,280,265 and US Pat. 4,476,750) locks the jaws in either mode for positive, repeatable operation—ideal for technicians who need one tool to cover both ring types. The kit includes five pairs of replaceable tips so you can match ring diameter and access angle (straight and angled options), plus the included Allen wrench for fast tip changes. It’s a compact, field-ready set for automotive, HVAC, appliance, and industrial MRO.

Features

• Convertible design (Internal/External): Flip the mechanism to expand or compress rings without changing tools.
• Replaceable tips (5 pairs): Multiple diameters and angles to match common ring sizes; easy swap with included Allen wrench.
• Heavy-duty construction: Steel body with positive detent selector for secure mode changes.
• Fine-control jaws: Minimize tip splay and keep engagement solid on stubborn rings.
• Knurled/ergonomic grips: Secure handling with oily or gloved hands.
• Compact storage: Ships as a ready-to-use hand tool—no bulky case required.
• Model & ID: 1221-S (also printed as 1221s in some listings); UPC 763279122155.
• Patents: US 4,280,265 and US 4,476,750 (jaw conversion and tip retention concepts).

What’s Included

• Hi-Tech 1221-S convertible snap ring pliers
• 5 pairs of replaceable tips (assorted diameters/angles — straight & angled)
• Allen wrench for tip swaps
• Factory literature/insert (when present)

Applications / Spheres of Use

• Automotive & powersports: Transmissions, wheel hubs, CV joints, master cylinders, motorcycle forks.
• HVAC/R: Compressor clutches, blower assemblies, motor end bells, control valve cartridges.
• Electrical/industrial: Gearboxes, relay/mechanism retainers, small machinery and pumps.
• Appliance repair: Washers, dryers, dishwashers—retaining rings on shafts and pulleys.
• General maintenance: Any internal/external snap ring removal/installation task.

Basic Specs (typical for this model class)

• Operation modes: Internal (compress) / External (expand), tool-side selector.
• Tip interface: Screw-retained, user-replaceable; multiple diameters to fit common ring holes.
• Angles available: Straight and angled tips (from the included set).
• Material: Hardened steel body and tips (serviceable, replaceable).

Cross-Referenced / Related Hi-Tech Models

• 1220-S / 1221-S — convertible snap ring pliers with replaceable tips (assortment variants).
• HT-1221 — alternate print/packaging code used by some distributors.
• Replacement tip kits — assorted straight/angled tips for 1221-series pliers.

Comparable Products

• Channellock 927/926 convertible snap ring pliers with tip sets.
• Knipex 44xx series precision internal/external snap ring pliers (fixed-tip and replaceable-tip versions).
• GearWrench / KD Tools convertible pliers with multi-tip assortments.
• IRWIN internal/external pliers kits for general service.

Use as Part of Larger Assemblies / Systems

These pliers are a staple in automotive transmission benches, HVAC motor/clutch service, pump/gearbox rebuild stations, and industrial MRO carts. Pair with:

• Calipers to verify ring groove diameter,
• Replacement snap rings (internal/external, standard or heavy-duty),
• Needle-nose & picks to start ring removal, and
• Safety glasses—rings can spring free under tension.

Trademarks

Hi-Tech and any other manufacturer names or marks mentioned are trademarks or registered trademarks of their respective owners. All trademarks are used strictly for identification and comparison purposes only.

Related

hi-tech 1221-s snap ring pliers; convertible internal external circlip pliers; replaceable tip snap ring tool; 5 tip pairs with allen key; upc 763279122155; model 1221s circlip plier; device to remove/install retaining rings; automotive transmission snap ring pliers; hvac compressor clutch circlip tool; industrial mro snap ring kit

Common Requests:

1. “What tip sizes are included with the Hi-Tech 1221-S, and which rings do they cover?”
2. “How do I switch from internal to external mode on the 1221-S?”
3. “Are replacement tips available and interchangeable with other Hi-Tech models?”
4. “Best practice to avoid ring deformation or tip breakage on stubborn circlips?”
5. “Does the 1221-S work with heavy-duty snap rings in transmissions and compressors?”

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