Profile: MarJam Supply Co. is a distributor of lumber, plywood and other building materials. We sell acoustical ceiling systems, doors and frames, windows, roofing, siding, flooring, insulation, tools, hardware, and equipment. We also provide wall systems, lumber, plywood, adhesives, masonry and specialty items to builders, contractors, architects, engineers, the government & the public. Milwaukee® Twist-Release™ hole saw arbor is a universal quick change arbor for all hole saws. Milwaukee hole saw arbors are made from hardened carbon steel and alloy steel. The Milwaukee ECX™ bit prevents bit wear from hardened screws, and extends bit life when fastening specialty screws found in electrical boxes, conduit couplers, outlets, and other common job site fixtures.