Trend Replacement Square Drive Bit, WP-DK/JIG/1

Theses are trash the whole system is trash. Here is my review for the jig that goes along with these bits:I bought this jig because I wanted to conceal screws. The problem with it is that the crews they make you use are absolute garbage. I'd imagine with very soft wood they might work but overall poor quality. The steel is very mild and the square bit head thread easily. In addition, very ofter the screw heads would shear off due to the force of being driven in (not what you want a screw to do). The bit is an SQ1 which is a specialised bit I could only find from trend. The quality of their bits are also garbage. They wear down incredibly quickly and I had two of them shatter (newer had any of the bits do this). I am no expert but this really isn't a product I would recommend.

Totally rubbish, burrs over quickly. Have been through 5 bits laying a timber deck and wasted so much time removing damaged screws.