GO! Half Square Triangle-4 1/2" Finished Square

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Quick Overview

Two half square triangles sewn together form a 4 1/2" finished square. Triangles are a basic building block in quilting. Arrange triangles in colorful combinations for great quilt designs. Combine with GO!

Compatible with these fabric cutters:

*Must use with GO! Die Adapter

GO!® Half Square-4 1/2" Finished Triangle (55397)

Use this GO! Half Square Triangle-4 1/2" Finished Square die to cut multiple triangles at once. It's compatible with the GO!, GO! Baby, GO! Big, and Studio fabric cutters, and makes clean, accurate cuts every time. The triangles cut with this die can be arranged to create a bevy of designs and combinations.

Use GO! dies with your GO! and GO! Baby Fabric Cutters to cut precise, accurate shapes in just seconds.

Features and Benefits:

  • Cut so much more in less time—Cut up to 6 layers of 100% cotton fabric at once
  • Easiest to use—Simply place die on cutter, then fabric and cutting mat on top
  • Get accurate cuts every time—No slipping rulers or mistakes
  • Create quilts you never thought you would—AccuQuilt makes cutting curvy classic quilt patterns a snap
  • Save fabric with Two Tone Foam—Get more out of your fabric by placing it only over the shape you want to cut
  • Safe to use—No blades come anywhere near your fingers
  • No more math—Geometric shapes are designed with an accurate 1/4" seam allowance in the design
  • Quilt more, clip less—No more clipping all those dog-eared corners
  • Quick and easy applique—Apply fusible web to fabric prior to cutting

Storage: Organize GO! dies with AccuQuilt GO! Die Storage Rack (55115).

Care & Maintenance: Use adhesive roller to clean lint and thread from dies. After each use, with the die pick provided with the cutter, remove any threads imbedded between blades and foam. It's normal for threads to get caught where blades meet in a die. Remove with tweezers or die pick. Die blades never need to be sharpened.

Die Tips:

  • With some fabrics, after cutting, a thread or two will remain where die blades meet. Snip threads with scissors.
  • Use cutting mats that matches size of each die.
  • For best results, cut with die blades running under roller at an angle. Do not cut with blades parallel to roller.
  • Blades on some dies are positioned at an angle. Align fabric to edge of shape, not edge of die board.
  • Some dies feature specially designed corners to aid in alignment and pre-cutting.
  • For fast applique, apply fusible web to fabrics, then cut shapes with dies.
  • Use good quality fabric to reduce fabric stretch.
  • It's always a good idea to test cut one shape before cutting many shapes to ensure fabric orientation is correct.

Warranty: AccuQuilt GO! dies are guaranteed for one year.

Details and Dimensions
Designer AccuQuilt
Compatible Fabric Cutter GO! Baby Fabric Cutter (55600), GO Fabric Cutter (55100S)
Cutting Mat/Plastic Required GO! Cutting Mat, 6 in. x 6 in. (15.2 cm x 15.2 cm) Item 55137
Cut Size Two 5"W x 5"H (13 cm x 13 cm) Triangles
Finished Size 4 1/2"W x 4 1/2"H (11 cm x 11 cm) Triangles
Die Board Size 6 in. x 6 in. (15.2 cm x 15.2 cm)
Item 55397
Weight in lbs. 1.56
Brand AccuQuilt
Warranty Limited One Year

In stock items will ship within 2 business days if ordered before 12:00 p.m. CST Mon-Fri. Most in-stock items will arrive at your U.S. address 3-8 business days (Ground Shipping) after your order is shipped.

Please note that deadlines for certain items, including Deluxe Cutting Cabinets (SKU 50903), are different than those of general merchandise as those items cannot be expedited. To make sure your gift selection can arrive on time, always check the Shipping tab located at the bottom of the specific product page.

The shipping time frames above apply to in-stock merchandise delivered to the contiguous United States, and does not include Alaska, Hawaii or APO/FPO addresses.

Studio Backordered items are currently out of stock, but are available for purchase.  Your entire order will ship with the backordered item(s) within 12 business days.

Pre-Order items will ship as indicated on the product page. Once shipped, your items will arrive at your U.S. address 3-8 business days (Ground Shipping) after your order is shipped.

Help & Guides

Customer Reviews

Overall Rating

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  • Peggy · 7/31/2016

    Truly speeds up cutting

    Am able to have accurately cut pieces without hand pain. This die has sped up my cutting time immensely which gives me more sewing time. Great tool, very versatile.

  • Judith · 4/26/2016


    I needed about 1500 of these HST's for a group project. It would have taken me forever to cut this many by hand. So glad I bought this die.

  • Teresia · 4/20/2016

    Great complement to 5" die

    How to make HSTs with amazing speed and combine them with GO cut 5" squares. OMG. This has made me so productive.

  • Jo Ann · 2/25/2016

    Great die

    A must have die for anyone's collection.

  • Ruth · 1/16/2016

    great for beginners and so quick to cut out whole quilts

    so easy to use with the clipped corners

  • Norma · 1/12/2016

    Love it!

    I collect charm squares when I go on quilt hops. This die and some scraps and I can add HST blocks to the charm squares to easily make a quilt.

  • JANE · 9/8/2015

    Speedy little half square

    I cannot say enough about this die along with all the rest. I want them all ❤️

  • Deborah · 8/6/2015

    Great die

    Love making a charm square quilt with some half square triangles - really adds interest

  • Peggy · 7/24/2015

    Love my dies

    This is one I will use the most it will be a big help.

  • Channie · 7/22/2015

    Super Time Saver

    Love it, makes sewing them together so much easier!!!