Amazon has the Intcrown Electric Pet Nail Grinder for $19 - $4 off with coupon JZXRSEAI (Ends 10/19) = $15 with free shipping on $25+ or with Prime. List price: $40. Features made of high-quality diamond bit grinder, two guard attachment with four size ports, 60dB maximum noise level.
Has good Amazon Reviews.
Amazon has the Swanson 7" & 12" Speed Square Kit for $14 with free shipping on $25+ or with Prime. Features 7 inch and 12 inch speed squares included, heavy gauge aluminum alloy construction, matte finish to prevent glare, 1/4 inch spaced notches to facilitate scribing lines. Home Depot sells it for the same price.
Has excellent Amazon Reviews.