Angle Drive drill attachment

[Yorkie]

I recently needed an angle drive drill attachment for drilling holes in innacessible places, and spotted one on e-bay for £12.00 + £3.00 P&P. I got it from this link, and am very plerased with it:

http://www.ebay.co.uk/itm/Prof-All-Metal...0843034477

What appears to be an identical angle drill attachment is shown at this link, but at twice the price, (£23.98) just for a badge:

http://www.machinemart.co.uk/shop/produc...attachment

£23.98

There are some adverse comments in reviews on Amazon for these angle attachments, but on reading those reviews, it's clear that they expected far too much of the attachment eg, drilling 25mm holes with a flatbit in a high speed electric drill through several joists to run electric cables. This is clearly beyond the stated capabilities of the attachement, which the write-up makes clear that it is for use at low speeds. I'm not sure which bit of 'only for use at low speeds' the critics don't understand.

The write up says 'if the item fails and the gears are found to be 'blued' doue to excessive speed, the warranty will not be honoured'. At least that suggests that the gears are made of stel of some kind - ot alloy. I once had a 'Ferm' biscuit jointer which worked fine till it hit a knot which stripped the gears. When I opened it up, the gears were die cast aluminium and clearly not up to the task.