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Hardened ball-check design retains grease pressure and excludes contaminants
Plain type for general centre drilling work
▲Zinc Plated Finish
UNS Hex Bolt Grade 8 High Tensile Zinc Finish (linch pin
Sutton D504 Step Drill Bit - Metric - Spiral - High Speed Steel Swages Hardened ball-check design retains grease9 Steps Spiral flute for clean cut Workshop ready A spiral flute step drill in HSS, 9 steps, made to cut multiple hole sizes from a single bit. The spiral flute clears chips faster than straight flute and reduces grabbing in thin sheet material.
