Use GRK Fasteners T-25 2 in. GRK Star Bits (2 per Pack) with GRK screws (sold separately). Compatible with the recess Caliburn PH, RSS #10 and 1/4 in. screws and featuring a green finish, the star bits come in a (2 per Pack) so that you have a spare on hand.
Use with recess caliburn Ph, RSS #10 and 1/4 in. screws
This review is for the Regular 2in T-25 Star bit,Model # 772691874436 and not the backboard one.
I used this bit to drive several 1/2" screws and it worked well. Having the 2" bit great because most of my T-25 bits require a bit holder, but this is long enough that I can can insert it right into the chuck. Allowing me to use this anytime, sometimes I do not have a bit holder on me and I am unable to do anything unless I run back to grab one.
They are made by Illinois Tool Works Inc. but they are actually made in Taiwan. They are quite heavy for their size so I hope that means they are made from a good steel. They are also quite expensive because you normally get them for free when you buy screws. I think they are better made
They are designed to be used with “Backer-On” and “Rock-On” screws which I have never used before. I’ll have to look out for them and try them out. I tried the star bit with another type of star screw and the screw stuck on the bit really well and it drove it well also.
Pros: Durable, Good Size & Weight, Long-Lasting, Strong
I regularly use Deckmate screws and they require this "T-25" bit. These are well made and fit the Deckmate screw perfectly, in fact, just snug enough to hold the screw allowing for single hand operation of the drill. These bits fit my standard, run-of-the-mill, 3/8 chuck drill. They seem hardened enough to withstand many uses. It's always handy to have multiple T-25 bits, especially since I use them all the time.
Pros: Accurate, Durable, Easy to Use, Good Size & Weight, Long-Lasting, Strong, Sturdy