This set contains a wooden block and four bolts which screw into permanently fixed, threaded receptacles. The board also has two insets: one for the wrench and one for holding the bolts once they've been removed.
This set lets students practice the action of using a wrench by removing and re-inserting four hex-head bolts using the supplied tool.
Note: Do not over tighten the screws as this may result in the threaded receptacles being removed from the block when unscrewing.
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