Klutch Cobalt High Speed Steel Drill Bits are designed to cut through extremely hard metals, including stainless steel. No center point is needed, as these 135 quick cut points are self-centering and penetrate faster with less pressure. Will not walk or wander at the starting surface. Extremely heat-resistant, these drill bits are most efficient in drills that operate at 1500 RPM or more. Bit Material High speed steel, Drill Bits qty. 21, Size 1/16-3/8, Storage Type Metal case. Cuts through hard metals, including stainless 135 quick cut points are self-centering and will not walk or wander High speed bits are heat-resistant and operate most efficiently at 1500 RPM or more Has 12X l.. Klutch Cobalt High Speed Steel Drill Bit Set – 21-Pc. Northern Tool Item# 42485. 1.5800 lb(s). Klutch® Cobalt High-Speed Steel Drill Bits are designed to cut through extremely hard metals, including stainless steel. No center point is needed, as these 135° quick-cut points are self-centering and penetrate faster with less pressure. Extremely heat resistant, these drill bits are most efficient in drills that operate at 1500 RPM or more. All orders will contain an invoice/receipt. IMPORTANT: We will not honor requests to remove invoices or receipts from packages. If a PO box address is submitted without a physical address it may delay your order. We may already have an answer to your question! We reserve the right to correct ad errors and/or omissions. Pricing and availability is subject to change without notice.