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Gisafai Square Hole Drill Bit Adapter and Square Hole Drill Bit Set for Wood Mortising Attachment Drill Press Hollow Chisel Mortise Drill Tool for Mortise Machine (6 Pcs,1/4, 5/16, 7/16, 1/2, 5/8')

4.7 (8) Write Review
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$53.99

$ 25 .99 $25.99

In Stock

About this item

  • Square Hole Drill Bit Set: come with 1 square hole bit adapter and 5 square hole drill bits, Drill bits diameters: 1/ 4 Inch (6.4mm), 5/ 16 Inch (8mm), 7/16 Inch (11mm), 1/ 2 Inch (12.7mm), 5/8 Inch(16mm), and hand drill clamp diameters ranging from 38 to 55 mm/ 1.5 to 2.2 inches for easy installation and use; Please note that it is only suitable for bench drill and hand drill with clamps
  • Quality Materials: the square hole drill bit adapter is made of quality carbon steel, strong and durable, can firmly fix the wood, the drill bit adapter measures about 6.3 inches/ 16 cm in length, upper inner diameter is about 0.75 inch/ 1.9 cm, lower diameter is about 2.17 inches/ 5.5 cm, reduce the use of error, specially designed with mortise bit accessories drill bit will not be blocked by wood chips, high hardness, no rolling, cutting speed, the bit is sharp, please take it out safely
  • Efficient and Accurate: the bit adapter and the matching drill attachments in 5 sizes make it easier to use, and the precision design of the drill press mortise attachment ensures that you can drill the right mortise and mortise holes in the fastest way; More convenient and faster than mortise machine
  • Widely Applicable: combines 1 square hole drill bit adapter with 5 square hole drill bits; This layout simplifies the process of drilling square holes in wooden planks; With this accessible and straightforward tool, you can reduce your efforts, catering to both beginners and workers; Appropriate for construction, carpentry DIY, decoration industry, which is suitable for compression board, plastic, density board, sandalwood, pine, ash, pine and other materials with low hardness
  • Dual Support Bracket: square hole drill bits for wood are reliable and useful, suitable for bench drill and hand drill; Square hole bit adapters are ideal for woodworking, furniture manufacturing and other related industries


Product Description

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Tim B
September 6, 2025
I thought the Gisafai square hole drill adapter and drill bits are a good set for the price. I was able to mount it to my craftsman bench top drill press with a minor modification (2 locking screws added) and with care, have gotten acceptable results. This set has met my needs and my expectations.
chaz s.
July 29, 2025
I don't leave reviews often but this product is advertised very well. It DOSE NOT WORK. The drill bit itself is OK. But the square plunger however, if you do bow up on it enough to get it into the wood, good luck getting it out. Buyer beware. False advertisement at its finest.
Roberto
July 18, 2025
Como lo expresa el título, me facilita trabajo de hacer las uniones de espiga.¡¡¡♧♧A quien la diseñó, mi reconocimiento!!!
Wayne The Pain
July 15, 2025
Did not work as advertised. Quailty very good product. But needs to be used with a press drill not a hand drill.
Justin G.
May 14, 2025
Cheap pot metal. The part that clamps to the drill press snapped before I even used it.
phil peck
February 14, 2025
Out of the box, tools are not sharp, kinda scared to try using this. Will update when I’ve done some test holes
Customer
January 18, 2025
There were no instructions. It was metric bits not standard. Did not work on hard wood.
Melvin Glen Minton
January 12, 2025
It doesn’t work