Lockable window handles rotate to accommodate casement windows and doors opening left or right and inward or outward with the set of aluminum door handles, secure windows, balcony doors or patio doors to protect your children,the keys are identical, only one can be used for all the locks, you receive 4 window handles, 8 keys, 8 olive screws with a spindle length of 35 mm, they fit all windows with a 7mm square mount and 43mm ,screw spacing dimensions (L x W x H) 17.1 x 15.8 x 4.5 cm Part Size 4x color white style handle material aluminum installation method screw-on number of handles 4