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Perma-Grit Large Countersink 100º  1/4, 11.5mm dia.

Perma-Grit Large Countersink 100º 1/4, 11.5mm dia.


The Perma-Grit Large Countersink 100 degree, 1/4 Nipple, 11.5mm dia. LC4.


The Large Rotaries with 6 mm arbor / shaft for Air tools. Turned down from solid, they are perfectly balanced. Excellent for composite work, wood, carbon fibre, ceramic, stone, perspex etc. (not recommended for use on metal).


Ideal for routing, shaping and removing materials without tearing or clogging. Use on all Woods, Glass Fibre, Carbon Fibre, Kevlar, Plexiglas, Lexan, Perspex, Acrylics, Plastics, Polystyrene, Ceramics, Stone etc.

Excellent on Perspex, Plexiglass, Lexon, use below 10,000 RPM and they will not melt, crack or chip them. (not recommended for use on metal)

Note Rotaries should be fully inserted in to the chuck and tightened before using. Maximum RPM 20,000 Low - Medium.

SAFETY:- Always wear protective goggles when using Rotary Tools.

IMPORTANT:- Carbon Fibre should not be cut using an electric drill, because of the possibility of electrocution.

  • Product Info

    Perma-Grit Large Countersink 100º 1/4, 11.5mm dia.

    Shaft / arbor 6mm 

    Overall length 40mm

    Gritted length 7mm

    Widest point 11.5mm

    Nipple 6mm

    (all measurements are approximate)

  • Shipping Info

    Shipping costs for Australian residents will be charged at checkout. If you are a customer from outside Australia please contact us for a postage cost and we will happy supply you with the international postage cost. 

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