Tough clear ABS composite plastic shield with ball bearing mount for hole saws up to 6 1/4-in. diameter and 2 1/2 in. deep. XL-Arbor adapter for standard 1/2- and 5/8-in. thread mount hole saws with ability to control cutting depth for use on all Hole Pro kit shields. Soft double lip silicone gasket for tight dust seal and no marring of surface. Shield traps all dust and shavings and insures straight hole cut. Vacuum adapters for easy connection to HEPA vacuums where there is mold, asbestos, lead paint.