The milwaukee knuckle is an offset attachment for heavy duty applications it is impact rated and can be used with both cordless and impact drills the knuckle attachment is very compact and ideally suited to working in confined and limited spaces its solid metal construction absorbs impact action a 14 inch hex shank fits directly into the chuck preventing slippage positions 0 and 30 this counter display contains 10 x 11 piece knuckle sets each set contains the following 1 x knuckle3 x philli