My [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]size genetics[/words] uses M4-0.7 screws. I used 20mm length on mine using 1/2 wood.
I just used hand tools. lol so it came out a little rough.
Now I don't lose about an inch of bar going into the head piece. And since I use less bars it is less bulky. Now slipping on is so fast and easy. I just compress the springs and hook in.
I have seen other [words=http://TLCTugger.com/MOS]vlc[/words] [words=http://TLCTugger.com/MOS]tugger[/words] with a different wire hook but you should be able to make it work just the same.
I just used hand tools. lol so it came out a little rough.
Now I don't lose about an inch of bar going into the head piece. And since I use less bars it is less bulky. Now slipping on is so fast and easy. I just compress the springs and hook in.
I have seen other [words=http://TLCTugger.com/MOS]vlc[/words] [words=http://TLCTugger.com/MOS]tugger[/words] with a different wire hook but you should be able to make it work just the same.