You can purchase it here

0Ah battery with fuel gauge delivers long runtime

Fully sealed end - suitable for cleaning out swarf tanks

Shape: Sub Angular

TruaCut 1/4" Shank 16mm x 1.6mm Rounding Over Router Bits with Bearing TB502 / TB502S 18v You can purchase it hereRounding Over Bits Rounding over bits are the most used of all the edge forming router bits. They are used for just breaking the sharp edge on a job as well as cutting decorative edging to form drop leaf joints. (Matching jointing bits are the Cove Bits.) Fitted with Mark free 12. 7 x 4. 8mm (B105) ball bearing guide these bits tend not to burn the work surface. The bit can also be converted into Beading bits just by changing to a smaller bearing