Color your Pozis bronze

[PJs]

Thanks Marv, a fascinating topic especially in today's world of screws and head types. I Like your idea of a sharpie color code for the Pozi's. I always thought they would take off better than they have, but the key is to be aware when you pick up a "Crosspoint" type screw to check for the indents then the appropriate bit for it and vice versa. With the advent of portable drivers the proliferation of technologies in thread styles, head types, etc. it's an absolute must to have a good selection of bit types and sizes...and some spares of the common types.

Another good Wiki is their list of screw drives. Although a cursory explanation it does have some pointers as to the uses for the head types and derivations.

A few months back I helped my son build a good sized loft in his garage for storage. What shocked me was the diversity of screw types for wood now at the big box store...starting to think you need a degree to choose the appropriate types for the applications. We used my impact driver and bought Robertson head screws (2") for 5/8 ply into the rafters and runners we put in. Luckily and each box came with a bit...smart on the maker. After about 75 it snapped and thank goodness we both had a couple of sets because we snapped off a couple more. Next store run we picked up some Impact rated Roberstons and was pleasantly surprised how well they held up. Turns out after some later research, there has been a lot of metallurgical study to get the ductility just right for the impact driver bits. They will still cam out, but this link kind of gives a clue why, particularly on Phillips.

The most fascinating to me is the thread technology now for the various applications, like wood, plastic decking, drywall, sheet rock etc. Even though Machine screws are generally what we use, it's a whole new world out there with some cool designs. Now if we could come up with some good re-purposing uses for dead bits....

Thanks for posting this and hope others chime in to this great subject. ~PJ