A Spiral Flute is needed mostly when drilling vertically to ensure clearance of debris. For horizontal drilling under 18”, a Spiral Flute may not be required at all. If a Spiral Flute will be used, be sure to use 18” Extension # 800RE455 first. Other extension can then be fastened on to #800RE455 if deeper drilling is necessary.
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Item #

Size

Overall Length

Type

800RF140 N/A 1-1/2 " N/A 16 " N/A Spiral
800RF145 N/A 1-3/4 " N/A 16 " N/A Spiral
800RF152 N/A 2 " N/A 16 " N/A Spiral
800RF165 N/A 2-5/8 " N/A 16 " N/A Spiral
800RF180 N/A 3-1/8 " N/A 16 " N/A Spiral
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