CRL Unibit® Step Drill 3 Piece Set Steel & Brass Tube Drill Bits This 6" (152 mm) cup

This 6" (152 mm) cup uses the same plunger as the Wood's W4950

and odors through glass-to-glass (butt) joints

Tremco® Spectrem® 2 Silicone Sealant is a medium modulus

Full Rubber Lining on All Contact Surfaces

CRL Unibit® Step Drill 3 Piece Set Steel & Brass Tube Drill Bits This 6" (152 mm) cupDrill Up To 13 Diameters with Just One Drill Perfectly Round Holes in Thin Material The CRL Unibit Step Drill Set uses a unique, single flute design to drill perfectly round holes in thin materials. Cutting steps of progressively larger diameters make it possible to drill up to 13 different hole sizes with a single bit. Also, the hole is automatically deburred by the cutting edge of the next size up. Hole starting is easy because it won't skid across