BG131133465 Thatsabout 19.5 mm. I think you are better for the 19mm then. I found that sometimes they can be too tight in places but you can also wiggle your drill bit in the hole to loosen lol. On here it is either 19 or 20mm. 19 is close and will fit, 20mm is too big and could mean you have to wrap a few layers of tape around them, so they fit snug.. Hope that helps...?

BG131133465 Justwatch out when you order, you can see two in the pictures - when actually there is one one. The size that is there is more than longer enough - offering stablity and thin enough for most basic woodworking operations.

BG131133465 Iwent for the 6mm specifically to use with my Ryobi router trimmer. So it was important that I have the shank right. I would check to see if there are the options to change the shank size before ordering. Usually there a few boxes which you can tap on and high-light, if theres a 8mm, there will be a box for it. Has for a detailed list of pieces., Umm. There are about two to three router bits of the same design and the information on the cutter is written down in the box - in mm and in inches (along with a simple profile outline of the bit itself). Its a great set, bits are sharp enough and spin very well balanced. The bearings wheels are ok - but not 100% interchangable - which is a real shame because it limits the true potential of this box set. Although 100 pieces will do any avid fan and craftsman a great start. So through use, you will figure out which bits you use the most over time, then you will know what to invest better in - in the near future. Perhaps buying a better more professional set or specific bit piece. Hope that helps..? Marcus - Marvellous Mirrors - Holland.

BG131133465 Ihave not played around with the chuck itself, I do know it can take a 10mm drill. There are bolts on the underside which I do feel you can undo and thus turn the head around. I have not done this yet. The guide is great and is very adjustable . I would double check the setting by drilling on a waste piece before committing to a full production run. I have often bradawled the center hole and pre-drilled before drilling with this system. But its sturdy enough and seem like it drills true and square. Hope that helps. Marcus - MarvellousMirrors :)