Brazed

5 pieces masonry drill bit set for drilling in Masonry, Concrete, Brick Wall Package Contents: 1-Piece 4mm Drill Bit, 1-Piece 5mm Drill Bit, 1-Piece 6mm Drill Bit, 1-Piece 8mm Drill Bit and 1-Piece 10mm Drill Bit Finishing: Chrome coated. Type: double flute conical tip Superior quality drill set by Cheston Material: HSS with brazed Carbide tip Please Contact 45136055 Quantity 13

The finned heaters are like basic tubular elements with the addition of continuous spiral fins brazed to the sheath or rectangular fins crimped to the sheath. Fins greatly increase surface area and permit faster heat transfer to air, resulting in lower surface element temperatures. https://www.theeta.com/product/finned-heaters