[Spline drive]

What is spline drive?

[Cordless rotary hammers.]

So I need the 4.0 ah and higher to use the dewalt dch253b

[multiple speed impact driver]

Thanks guys I was just wondering if I shoud upgrade to the 3speed dcf895d2 from the dcf886d2

[Show me your Makita collection!]

Not really a collection but it was at HD I had a coupon for 20% and I needed a hammer drill and it was too good to pass up.

[multiple speed impact driver]

What are the advantages of having a multiple speed impact driver?

[Impact driver/ drill driver]

Are there any retail stores that sell the belt clips and the bit holders for that screw into the sides of the tools?