Timco Metal Construction Timber to Heavy Section Screws - Countersunk - Wing-Tip - Self-Drilling - Exterior - Silver Organic 5.5 x 55 - 200 Pieces Pipe Threaders Ideal for impact drills up

Ideal for impact drills up to 750 watt

Double countersunk reduces the likelihood of head shear and assists completion of countersinking

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Timco Metal Construction Timber to Heavy Section Screws - Countersunk - Wing-Tip - Self-Drilling - Exterior - Silver Organic 5.5 x 55 - 200 Pieces Pipe Threaders Ideal for impact drills upDescription Timco Metal Construction Timber to Heavy Section Screws Countersunk Wing Tip Self Drilling Exterior Silver Organic 5. 5 x 55 200 Pieces product description: Specifically designed to attach wood to metal (Max. 12mm). Metric thread with wings designed to ream out the timber, so the screw can achieve Max. R. P. M. without burning out. When the wings hit the metal they will break off to permit the thread to self tap into the metal. Product