Starrett DB2 Debris Collection Bowl For FCH, DCH, TCT Multi Purpose, CT DiamondTo use the Starrett DB2 Debris Collector, simply insert the arbor shank through the eyelet at the nylon base, press the rim of the cowl against the surface of the material being sawn and begin sawing. The flange of the cowl then forms a seal against the material being cut, collecting all dirt and debris inside the cowl.Suitable for TCT Fast Cutting Multipurpose and Bi-Metal Hole Saws up to and including 121mm 4.34.FEATURESBowl flexes with minimal pressure as the hole is sawnTime savings collector to accumulate project waste while sawingKeeps dust and debris away from drill motor and airwaysSPECIFICATIONCompatible Threads 12x20 58x18Compatible Hole Saws FCH, DCH, TCT Multi Purpose, CT DiamondMin. Hole Enlargement 4.7mm 316