Ligation Solutions

Weck® Hem-o-lok® Polymer Locking Ligation System

Security you can feel from the #1 selling locking polymer clip

Why have surgeons trusted the Hem-o-lok System for more than one million patients? As the #1 selling locking polymer clip, the Hem-o-lok System offers quality, reliability, and performance in clip security.

Designed for confidence

Featuring a first-of-its-kind locking mechanism and distinct tactile feedback, the Hem-o-lok System gives surgeons the confidence of knowing they’ve locked securely on the patient vessel.

A history with robotic laparoscopy

Since 2007, we’ve collaborated with Intuitive Surgical to provide the Hem-o-lok System for use with the da Vinci® Surgical System.

Proven performance

Backed by 84 peer-reviewed articles, no other polymer clip stands on so much evidence to support clinical and financial outcomes. Based on an ex-vivo study*, Weck® Hem-o-lok® polymer clips provide unparalleled security compared to Ethicon LIGAMAX 5, Ethicon LIGACLIP® ERCA 10 mm, and Covidien Endo Clip III in three common clip failure modes. Hem-o-lok Medium/Large clips have:

  • At least 5 times greater clip retention in lateral pull-off force
  • At least 1.8 times greater leak resistance in leak pressure testing
  • At least 1.3 times greater clip retention in axial pull-off force

Versatility to meet your needs

Hem-o-lok Clips come in a range of sizes indicated to ligate structures from 2 mm to 16 mm.

Explore the Hem-o-lok System


Discover our full ligation portfolio, plus ordering information

The original polymer locking clip

Cutting-edge design

  1. Bosses are designed to retain clip in applier jaws.
  2. Integrated teeth interface with the vessel and are designed to prevent slippage.
  3. Bow-shape design allows removal with appropriate instrument.
  4. Hinge allows flexibility in clip placement prior to clip locking.
  5. Locking mechanism provides tactile feedback and secure closure.
  6. Nonabsorbable polymer is inert, nonconductive, and radiolucent; it does not interfere with CT, MRI, or X-ray diagnostics.

Because the Hem-o-lok System is a cool ligation system, there's no chance of thermal spread to vital structures – a common concern of many surgeons when using energy-based ligation solutions.

The Hem-o-lok System is available in four sizes: Medium, Medium-Large, Large, and Extra-Large. Ordering information in catalog

Manual Load Appliers

Open Appliers

  • Open appliers designed for Medium, Medium-Large, Large, and Extra-Large clips
  • Available in 8” and 11” lengths
  • Choice of curved or right-angle jaws
  • Opens at box-lock for easy, thorough cleaning Endoscopic Appliers

Endoscopic Appliers

  • Endo appliers designed for Medium-Large, Large, and Extra-Large clips
  • Medium-Large appliers available on a 5 mm platform, enabling ligation of 10 mm vessels through a 5 mm port
  • Available in 32 cm or extended-length 45 cm
  • One-piece and take-apart designs

Automatic Applier - Hem-o-lok® Auto Endo5® Applier

  • Secure delivery of 15 Medium/Large Hem-o-lok Clips – the only clips indicated for ligating up to a 10 mm vessel or tissue structure through a 5 mm port
  • 35 cm shaft, the longest available among automatic endoscopic clip appliers, for better reach and procedural flexibility
  • Three points of contact between the clip and the applier for enhanced stability

Automatic Polymer Ligation

Item No.


Clip Size

Shaft Length

No. of Clips



Weck Auto Endo5 Automatic Ligating Clip Applier


35 cm



Weck Hem-o-lok Polymer Ligating Clips



Item No.




Medium Polymer Clip





Medium-Large Polymer Clips





Large Polymer Clips





Extra-Large Polymer Clips




Click here for a complete list of Weck Hem-o-lok product codes (including manual appliers and clip cartridges).

*Data on file (2013 internal study), Teleflex Incorporated, Report #D001591. Testing conducted on porcine carotids, sample size = 33, p≤ 0.05. Clinical performance cannot be extrapolated from the data. Testing pressures range beyond physiological pressures.

Hem-o-lok® Ligating Clips are not intended for use as a fallopian contraceptive tubal occlusion device. Hem-o-lok Ligating Clips are contraindicated for use in ligating the renal artery during laparoscopic donor nephrectomies. Not all products may be available in all markets. Contact your local sales rep for availability. Rx Only.

da Vinci is a registered trademark of Intuitive Surgical.
Teleflex, the Teleflex logo, Endo5, Endo10, Hem-o-lok, and Weck are trademarks or registered trademarks of Teleflex Incorporated or its affiliates. LA-MC-004674 All other trademarks are the property of their respective owners.