This Rotary Hammer Dust Shroud for Hole Cleaning is OSHA Table 1 Compliant when paired with the DEWALT® SDS MAX combination hammers or SDS PLUS rotary hammers and select vacuums and extractors. It has two interchangeable drilling heads for optimum dust removal. One drilling head is for holes up to 1-1/2 in. and the other drilling head is for holes up to 2 in.