http://www.lowes.com/pd_548702-70-DWA8029D_1z0vj3o+1z0wckv__?productId=50160685&Ns=p _product_prd_lis_ord_nbr|0||p_product_quantity_sol d|1&pl=1&currentURL=%3FNs%3Dp_product_prd_lis_ord_ nbr%7C0%7C%7Cp_product_quantity_sold%7C1%26page%3D 1&facetInfo=In%20Store

The arbor hole is not keyed, it's perfectly round. Is that so that the
10" aluminum oxide cutoff wheel might slide instead of shatter/break on
startup?

By the way... Do all miter saws start abruptly? Mainly curious.

Thanks.